28595920 has 40 divisors (see below), whose sum is σ = 66781440. Its totient is φ = 11387520.

The previous prime is 28595909. The next prime is 28595933. The reversal of 28595920 is 2959582.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21021 + ... + 22339.

It is an arithmetic number, because the mean of its divisors is an integer number (1669536).

Almost surely, 2^28595920 is an apocalyptic number.

28595920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28595920 is an abundant number, since it is smaller than the sum of its proper divisors (38185520).

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

28595920 is a wasteful number, since it uses less digits than its factorization.

28595920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1603 (or 1597 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 28595920 is about 5347.5153108710. The cubic root of 28595920 is about 305.7980355253.

The spelling of 28595920 in words is "twenty-eight million, five hundred ninety-five thousand, nine hundred twenty".