28930690 has 16 divisors (see below), whose sum is σ = 53871480. Its totient is φ = 11173120.

The previous prime is 28930687. The next prime is 28930697. The reversal of 28930690 is 9603982.

It can be written as a sum of positive squares in 4 ways, for example, as 17363889 + 11566801 = 4167^2 + 3401^2 .

It is a super-2 number, since 2×28930690² = 1673969647752200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28930697) 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, 49591 + ... + 50170.

Almost surely, 2^28930690 is an apocalyptic number.

28930690 is a deficient number, since it is larger than the sum of its proper divisors (24940790).

28930690 is a wasteful number, since it uses less digits than its factorization.

28930690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99797.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 28930690 is about 5378.7256855133. The cubic root of 28930690 is about 306.9867260757.

The spelling of 28930690 in words is "twenty-eight million, nine hundred thirty thousand, six hundred ninety".