28624025 has 12 divisors (see below), whose sum is σ = 36320592. Its totient is φ = 22365840.

The previous prime is 28624007. The next prime is 28624031. The reversal of 28624025 is 52042682.

It is not a de Polignac number, because 28624025 - 2¹⁸ = 28361881 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12239 + ... + 14388.

It is an arithmetic number, because the mean of its divisors is an integer number (3026716).

Almost surely, 2^28624025 is an apocalyptic number.

28624025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28624025 is a deficient number, since it is larger than the sum of its proper divisors (7696567).

28624025 is a wasteful number, since it uses less digits than its factorization.

28624025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26680 (or 26675 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 28624025 is about 5350.1425214661. The cubic root of 28624025 is about 305.8981854731.

The spelling of 28624025 in words is "twenty-eight million, six hundred twenty-four thousand, twenty-five".