28377232 has 20 divisors (see below), whose sum is σ = 59210620. Its totient is φ = 13097088.

The previous prime is 28377229. The next prime is 28377257. The reversal of 28377232 is 23277382.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11861136 + 16516096 = 3444^2 + 4064^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68007 + ... + 68422.

It is an arithmetic number, because the mean of its divisors is an integer number (2960531).

Almost surely, 2^28377232 is an apocalyptic number.

It is an amenable number.

28377232 is an abundant number, since it is smaller than the sum of its proper divisors (30833388).

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

28377232 is a wasteful number, since it uses less digits than its factorization.

28377232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136450 (or 136444 counting only the distinct ones).

The product of its digits is 28224, while the sum is 34.

The square root of 28377232 is about 5327.0284399466. The cubic root of 28377232 is about 305.0165072137.

The spelling of 28377232 in words is "twenty-eight million, three hundred seventy-seven thousand, two hundred thirty-two".