28565770 has 16 divisors (see below), whose sum is σ = 53654400. Its totient is φ = 10929424.

The previous prime is 28565767. The next prime is 28565773. The reversal of 28565770 is 7756582.

It is an interprime number because it is at equal distance from previous prime (28565767) and next prime (28565773).

It is not an unprimeable number, because it can be changed into a prime (28565773) 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, 61870 + ... + 62329.

It is an arithmetic number, because the mean of its divisors is an integer number (3353400).

Almost surely, 2^28565770 is an apocalyptic number.

28565770 is a deficient number, since it is larger than the sum of its proper divisors (25088630).

28565770 is a wasteful number, since it uses less digits than its factorization.

28565770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124229.

The product of its (nonzero) digits is 117600, while the sum is 40.

The square root of 28565770 is about 5344.6955011488. The cubic root of 28565770 is about 305.6905253984.

The spelling of 28565770 in words is "twenty-eight million, five hundred sixty-five thousand, seven hundred seventy".