90304857 has 6 divisors (see below), whose sum is σ = 130440362. Its totient is φ = 60203232.

The previous prime is 90304793. The next prime is 90304861. The reversal of 90304857 is 75840309.

It can be written as a sum of positive squares in only one way, i.e., 73462041 + 16842816 = 8571^2 + 4104^2 .

It is not a de Polignac number, because 90304857 - 2⁶ = 90304793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90304157) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5016928 + ... + 5016945.

Almost surely, 2^90304857 is an apocalyptic number.

It is an amenable number.

90304857 is a deficient number, since it is larger than the sum of its proper divisors (40135505).

90304857 is a wasteful number, since it uses less digits than its factorization.

90304857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10033879 (or 10033876 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 90304857 is about 9502.8867719236. The cubic root of 90304857 is about 448.6458998189.

The spelling of 90304857 in words is "ninety million, three hundred four thousand, eight hundred fifty-seven".