28522320 has 40 divisors (see below), whose sum is σ = 88419936. Its totient is φ = 7605888.

The previous prime is 28522313. The next prime is 28522349. The reversal of 28522320 is 2322582.

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 (24).

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 7 ways as a sum of consecutive naturals, for example, 59182 + ... + 59661.

Almost surely, 2^28522320 is an apocalyptic number.

28522320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28522320 is an abundant number, since it is smaller than the sum of its proper divisors (59897616).

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

28522320 is a wasteful number, since it uses less digits than its factorization.

28522320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118859 (or 118853 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 28522320 is about 5340.6291764173. The cubic root of 28522320 is about 305.5354564312.

The spelling of 28522320 in words is "twenty-eight million, five hundred twenty-two thousand, three hundred twenty".