28137632 has 24 divisors (see below), whose sum is σ = 58312800. Its totient is φ = 13328064.

The previous prime is 28137589. The next prime is 28137661. The reversal of 28137632 is 23673182.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (32).

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 3 ways as a sum of consecutive naturals, for example, 22532 + ... + 23747.

It is an arithmetic number, because the mean of its divisors is an integer number (2429700).

Almost surely, 2^28137632 is an apocalyptic number.

It is an amenable number.

28137632 is an abundant number, since it is smaller than the sum of its proper divisors (30175168).

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

28137632 is a wasteful number, since it uses less digits than its factorization.

28137632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46308 (or 46300 counting only the distinct ones).

The product of its digits is 12096, while the sum is 32.

The square root of 28137632 is about 5304.4916815846. The cubic root of 28137632 is about 304.1556220756.

The spelling of 28137632 in words is "twenty-eight million, one hundred thirty-seven thousand, six hundred thirty-two".