28579690 has 16 divisors (see below), whose sum is σ = 51791400. Its totient is φ = 11354560.

The previous prime is 28579687. The next prime is 28579709. The reversal of 28579690 is 9697582.

It can be written as a sum of positive squares in 4 ways, for example, as 20912329 + 7667361 = 4573^2 + 2769^2 .

It is a super-2 number, since 2×28579690² = 1633597360992200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28579690.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8101 + ... + 11080.

Almost surely, 2^28579690 is an apocalyptic number.

28579690 is a deficient number, since it is larger than the sum of its proper divisors (23211710).

28579690 is a wasteful number, since it uses less digits than its factorization.

28579690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19337.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 28579690 is about 5345.9975682748. The cubic root of 28579690 is about 305.7401713105.

The spelling of 28579690 in words is "twenty-eight million, five hundred seventy-nine thousand, six hundred ninety".