28553750 has 40 divisors (see below), whose sum is σ = 54657504. Its totient is φ = 11180000.

The previous prime is 28553737. The next prime is 28553773. The reversal of 28553750 is 5735582.

It is a self number, because there is not a number n which added to its sum of digits gives 28553750.

It is a congruent number.

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 19 ways as a sum of consecutive naturals, for example, 66035 + ... + 66465.

Almost surely, 2^28553750 is an apocalyptic number.

28553750 is a deficient number, since it is larger than the sum of its proper divisors (26103754).

28553750 is an equidigital number, since it uses as much as digits as its factorization.

28553750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506 (or 491 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 35.

The square root of 28553750 is about 5343.5709034315. The cubic root of 28553750 is about 305.6476428901.

The spelling of 28553750 in words is "twenty-eight million, five hundred fifty-three thousand, seven hundred fifty".