28975420 has 12 divisors (see below), whose sum is σ = 60848424. Its totient is φ = 11590160.

The previous prime is 28975417. The next prime is 28975439. The reversal of 28975420 is 2457982.

It is a self number, because there is not a number n which added to its sum of digits gives 28975420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 724366 + ... + 724405.

It is an arithmetic number, because the mean of its divisors is an integer number (5070702).

Almost surely, 2^28975420 is an apocalyptic number.

28975420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28975420 is an abundant number, since it is smaller than the sum of its proper divisors (31873004).

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

28975420 is a wasteful number, since it uses less digits than its factorization.

28975420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1448780 (or 1448778 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 28975420 is about 5382.8821276339. The cubic root of 28975420 is about 307.1448562542.

The spelling of 28975420 in words is "twenty-eight million, nine hundred seventy-five thousand, four hundred twenty".