28750172 has 24 divisors (see below), whose sum is σ = 55665792. Its totient is φ = 12882800.

The previous prime is 28750157. The next prime is 28750199. The reversal of 28750172 is 27105782.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1478 + ... + 7725.

It is an arithmetic number, because the mean of its divisors is an integer number (2319408).

Almost surely, 2^28750172 is an apocalyptic number.

28750172 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28750172 is a deficient number, since it is larger than the sum of its proper divisors (26915620).

28750172 is a wasteful number, since it uses less digits than its factorization.

28750172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9289 (or 9287 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 28750172 is about 5361.9186864405. The cubic root of 28750172 is about 306.3468946768.

The spelling of 28750172 in words is "twenty-eight million, seven hundred fifty thousand, one hundred seventy-two".