28920395 has 16 divisors (see below), whose sum is σ = 41031360. Its totient is φ = 19146624.

The previous prime is 28920389. The next prime is 28920401. The reversal of 28920395 is 59302982.

It is an interprime number because it is at equal distance from previous prime (28920389) and next prime (28920401).

It is not a de Polignac number, because 28920395 - 2⁴ = 28920379 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 13232 + ... + 15261.

It is an arithmetic number, because the mean of its divisors is an integer number (2564460).

Almost surely, 2^28920395 is an apocalyptic number.

28920395 is a deficient number, since it is larger than the sum of its proper divisors (12110965).

28920395 is a wasteful number, since it uses less digits than its factorization.

28920395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28534.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 28920395 is about 5377.7685892943. The cubic root of 28920395 is about 306.9503079640.

The spelling of 28920395 in words is "twenty-eight million, nine hundred twenty thousand, three hundred ninety-five".