28347475 has 12 divisors (see below), whose sum is σ = 37855216. Its totient is φ = 20933280.

The previous prime is 28347469. The next prime is 28347481. The reversal of 28347475 is 57474382.

It is an interprime number because it is at equal distance from previous prime (28347469) and next prime (28347481).

It is not a de Polignac number, because 28347475 - 2³ = 28347467 is a prime.

It is a Duffinian number.

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 in 11 ways as a sum of consecutive naturals, for example, 43287 + ... + 43936.

Almost surely, 2^28347475 is an apocalyptic number.

28347475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28347475 is a deficient number, since it is larger than the sum of its proper divisors (9507741).

28347475 is a wasteful number, since it uses less digits than its factorization.

28347475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87246 (or 87241 counting only the distinct ones).

The product of its digits is 188160, while the sum is 40.

The square root of 28347475 is about 5324.2346867883. The cubic root of 28347475 is about 304.9098542155.

The spelling of 28347475 in words is "twenty-eight million, three hundred forty-seven thousand, four hundred seventy-five".