28402732 has 6 divisors (see below), whose sum is σ = 49704788. Its totient is φ = 14201364.

The previous prime is 28402691. The next prime is 28402771. The reversal of 28402732 is 23720482.

It is a self number, because there is not a number n which added to its sum of digits gives 28402732.

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 as a sum of consecutive naturals, namely, 3550338 + ... + 3550345.

Almost surely, 2^28402732 is an apocalyptic number.

It is an amenable number.

28402732 is a deficient number, since it is larger than the sum of its proper divisors (21302056).

28402732 is a wasteful number, since it uses less digits than its factorization.

28402732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7100687 (or 7100685 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 28402732 is about 5329.4213569580. The cubic root of 28402732 is about 305.1078432577.

The spelling of 28402732 in words is "twenty-eight million, four hundred two thousand, seven hundred thirty-two".