28597750 has 32 divisors (see below), whose sum is σ = 54302976. Its totient is φ = 11275200.

The previous prime is 28597729. The next prime is 28597753. The reversal of 28597750 is 5779582.

It is a junction number, because it is equal to n+sod(n) for n = 28597697 and 28597706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28597753) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17467 + ... + 19033.

It is an arithmetic number, because the mean of its divisors is an integer number (1696968).

Almost surely, 2^28597750 is an apocalyptic number.

28597750 is a deficient number, since it is larger than the sum of its proper divisors (25705226).

28597750 is a wasteful number, since it uses less digits than its factorization.

28597750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1657 (or 1647 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 43.

The square root of 28597750 is about 5347.6864156381. The cubic root of 28597750 is about 305.8045585825.

It can be divided in two parts, 2859 and 7750, that added together give a square (10609 = 103²).

The spelling of 28597750 in words is "twenty-eight million, five hundred ninety-seven thousand, seven hundred fifty".