28715790 has 16 divisors (see below), whose sum is σ = 68917968. Its totient is φ = 7657536.

The previous prime is 28715779. The next prime is 28715803. The reversal of 28715790 is 9751782.

It is a congruent number.

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, 478567 + ... + 478626.

It is an arithmetic number, because the mean of its divisors is an integer number (4307373).

Almost surely, 2^28715790 is an apocalyptic number.

28715790 is an abundant number, since it is smaller than the sum of its proper divisors (40202178).

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

28715790 is a wasteful number, since it uses less digits than its factorization.

28715790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957203.

The product of its (nonzero) digits is 35280, while the sum is 39.

The square root of 28715790 is about 5358.7115988827. The cubic root of 28715790 is about 306.2247270551.

The spelling of 28715790 in words is "twenty-eight million, seven hundred fifteen thousand, seven hundred ninety".