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64280 = 2351607
BaseRepresentation
bin1111101100011000
310021011202
433230120
54024110
61213332
7355256
oct175430
9107152
1064280
1144327
1231248
1323348
14195d6
15140a5
hexfb18

64280 has 16 divisors (see below), whose sum is σ = 144720. Its totient is φ = 25696.

The previous prime is 64279. The next prime is 64283. The reversal of 64280 is 8246.

It can be divided in two parts, 642 and 80, that multiplied together give a triangular number (51360 = T320).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 764 + ... + 843.

It is an arithmetic number, because the mean of its divisors is an integer number (9045).

264280 is an apocalyptic number.

It is an amenable number.

64280 is an abundant number, since it is smaller than the sum of its proper divisors (80440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72360).

64280 is a wasteful number, since it uses less digits than its factorization.

64280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618 (or 1614 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 64280 is about 253.5350074447. The cubic root of 64280 is about 40.0582484701.

The spelling of 64280 in words is "sixty-four thousand, two hundred eighty".

Divisors: 1 2 4 5 8 10 20 40 1607 3214 6428 8035 12856 16070 32140 64280