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83278485 = 3251850633
BaseRepresentation
bin1001111011010…
…11101010010101
312210200222121100
410331223222111
5132304402420
612132540313
72030566263
oct475535225
9183628540
1083278485
11430103a4
1223a81699
131433a714
14b0bb433
1574a0190
hex4f6ba95

83278485 has 12 divisors (see below), whose sum is σ = 144349452. Its totient is φ = 44415168.

The previous prime is 83278471. The next prime is 83278499. The reversal of 83278485 is 58487238.

It is an interprime number because it is at equal distance from previous prime (83278471) and next prime (83278499).

It can be written as a sum of positive squares in 2 ways, for example, as 11249316 + 72029169 = 3354^2 + 8487^2 .

It is not a de Polignac number, because 83278485 - 29 = 83277973 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1850633 = 83278485 / (8 + 3 + 2 + 7 + 8 + 4 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 83278485.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 925272 + ... + 925361.

It is an arithmetic number, because the mean of its divisors is an integer number (12029121).

Almost surely, 283278485 is an apocalyptic number.

It is an amenable number.

83278485 is a deficient number, since it is larger than the sum of its proper divisors (61070967).

83278485 is a wasteful number, since it uses less digits than its factorization.

83278485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1850644 (or 1850641 counting only the distinct ones).

The product of its digits is 430080, while the sum is 45.

The square root of 83278485 is about 9125.7046303286. The cubic root of 83278485 is about 436.6943824712.

The spelling of 83278485 in words is "eighty-three million, two hundred seventy-eight thousand, four hundred eighty-five".

Divisors: 1 3 5 9 15 45 1850633 5551899 9253165 16655697 27759495 83278485