28939632 has 20 divisors (see below), whose sum is σ = 74760840. Its totient is φ = 9646528.

The previous prime is 28939619. The next prime is 28939633. The reversal of 28939632 is 23693982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28939633) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 301407 + ... + 301502.

It is an arithmetic number, because the mean of its divisors is an integer number (3738042).

Almost surely, 2^28939632 is an apocalyptic number.

It is an amenable number.

28939632 is an abundant number, since it is smaller than the sum of its proper divisors (45821208).

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

28939632 is a wasteful number, since it uses less digits than its factorization.

28939632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602920 (or 602914 counting only the distinct ones).

The product of its digits is 139968, while the sum is 42.

The square root of 28939632 is about 5379.5568590731. The cubic root of 28939632 is about 307.0183509987.

The spelling of 28939632 in words is "twenty-eight million, nine hundred thirty-nine thousand, six hundred thirty-two".