28690704 has 60 divisors (see below), whose sum is σ = 91767936. Its totient is φ = 8197056.

The previous prime is 28690699. The next prime is 28690751. The reversal of 28690704 is 40709682.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13224 + ... + 15239.

Almost surely, 2^28690704 is an apocalyptic number.

28690704 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28690704 is an abundant number, since it is smaller than the sum of its proper divisors (63077232).

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

28690704 is a wasteful number, since it uses less digits than its factorization.

28690704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28484 (or 28475 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 28690704 is about 5356.3704128822. The cubic root of 28690704 is about 306.1355288408.

The spelling of 28690704 in words is "twenty-eight million, six hundred ninety thousand, seven hundred four".