28592220 has 48 divisors (see below), whose sum is σ = 83543040. Its totient is φ = 7292736.

The previous prime is 28592209. The next prime is 28592251. The reversal of 28592220 is 2229582.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8980 + ... + 11739.

It is an arithmetic number, because the mean of its divisors is an integer number (1740480).

Almost surely, 2^28592220 is an apocalyptic number.

28592220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28592220 is an abundant number, since it is smaller than the sum of its proper divisors (54950820).

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

28592220 is a wasteful number, since it uses less digits than its factorization.

28592220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20754 (or 20752 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 28592220 is about 5347.1693446159. The cubic root of 28592220 is about 305.7848459801.

The spelling of 28592220 in words is "twenty-eight million, five hundred ninety-two thousand, two hundred twenty".