28306632 has 32 divisors (see below), whose sum is σ = 74930400. Its totient is φ = 8880384.

The previous prime is 28306609. The next prime is 28306633. The reversal of 28306632 is 23660382.

It is a self number, because there is not a number n which added to its sum of digits gives 28306632.

It is not an unprimeable number, because it can be changed into a prime (28306633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34282 + ... + 35097.

It is an arithmetic number, because the mean of its divisors is an integer number (2341575).

Almost surely, 2^28306632 is an apocalyptic number.

It is an amenable number.

28306632 is an abundant number, since it is smaller than the sum of its proper divisors (46623768).

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

28306632 is a wasteful number, since it uses less digits than its factorization.

28306632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69405 (or 69401 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 28306632 is about 5320.3977294935. The cubic root of 28306632 is about 304.7633459412.

The spelling of 28306632 in words is "twenty-eight million, three hundred six thousand, six hundred thirty-two".