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90381305 = 572582323
BaseRepresentation
bin1010110001100…
…01101111111001
320022001211211202
411120301233321
5141114200210
612545103545
72145141230
oct530615771
9208054752
1090381305
11470218a3
1226327bb5
1315956681
14c009b17
157e049a5
hex5631bf9

90381305 has 8 divisors (see below), whose sum is σ = 123951552. Its totient is φ = 61975728.

The previous prime is 90381301. The next prime is 90381307. The reversal of 90381305 is 50318309.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90381305 - 22 = 90381301 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90381301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1291127 + ... + 1291196.

It is an arithmetic number, because the mean of its divisors is an integer number (15493944).

Almost surely, 290381305 is an apocalyptic number.

It is an amenable number.

90381305 is a deficient number, since it is larger than the sum of its proper divisors (33570247).

90381305 is a wasteful number, since it uses less digits than its factorization.

90381305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2582335.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 90381305 is about 9506.9082776684. The cubic root of 90381305 is about 448.7724652073.

The spelling of 90381305 in words is "ninety million, three hundred eighty-one thousand, three hundred five".

Divisors: 1 5 7 35 2582323 12911615 18076261 90381305