28457670 has 32 divisors (see below), whose sum is σ = 71269632. Its totient is φ = 7258592.

The previous prime is 28457669. The next prime is 28457683. The reversal of 28457670 is 7675482.

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 15 ways as a sum of consecutive naturals, for example, 19932 + ... + 21311.

It is an arithmetic number, because the mean of its divisors is an integer number (2227176).

Almost surely, 2^28457670 is an apocalyptic number.

28457670 is an abundant number, since it is smaller than the sum of its proper divisors (42811962).

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

28457670 is a wasteful number, since it uses less digits than its factorization.

28457670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41276.

The product of its (nonzero) digits is 94080, while the sum is 39.

The square root of 28457670 is about 5334.5730850744. The cubic root of 28457670 is about 305.3044348975.

The spelling of 28457670 in words is "twenty-eight million, four hundred fifty-seven thousand, six hundred seventy".