28406332 has 12 divisors (see below), whose sum is σ = 49748440. Its totient is φ = 14192496.

The previous prime is 28406327. The next prime is 28406347. The reversal of 28406332 is 23360482.

It is a self number, because there is not a number n which added to its sum of digits gives 28406332.

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 3 ways as a sum of consecutive naturals, for example, 8758 + ... + 11554.

Almost surely, 2^28406332 is an apocalyptic number.

It is an amenable number.

28406332 is a deficient number, since it is larger than the sum of its proper divisors (21342108).

28406332 is a wasteful number, since it uses less digits than its factorization.

28406332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5340 (or 5338 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 28406332 is about 5329.7590939929. The cubic root of 28406332 is about 305.1207333538.

The spelling of 28406332 in words is "twenty-eight million, four hundred six thousand, three hundred thirty-two".