28403372 has 6 divisors (see below), whose sum is σ = 49705908. Its totient is φ = 14201684.

The previous prime is 28403363. The next prime is 28403381. The reversal of 28403372 is 27330482.

It is an interprime number because it is at equal distance from previous prime (28403363) and next prime (28403381).

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 as a sum of consecutive naturals, namely, 3550418 + ... + 3550425.

It is an arithmetic number, because the mean of its divisors is an integer number (8284318).

Almost surely, 2^28403372 is an apocalyptic number.

It is an amenable number.

28403372 is a deficient number, since it is larger than the sum of its proper divisors (21302536).

28403372 is a wasteful number, since it uses less digits than its factorization.

28403372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7100847 (or 7100845 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 28403372 is about 5329.4814006618. The cubic root of 28403372 is about 305.1101349099.

The spelling of 28403372 in words is "twenty-eight million, four hundred three thousand, three hundred seventy-two".