28757190 has 128 divisors (see below), whose sum is σ = 87920640. Its totient is φ = 5846400.

The previous prime is 28757173. The next prime is 28757207. The reversal of 28757190 is 9175782.

It is an interprime number because it is at equal distance from previous prime (28757173) and next prime (28757207).

It is a super-2 number, since 2×28757190² = 1653951953392200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 136185 + ... + 136395.

It is an arithmetic number, because the mean of its divisors is an integer number (686880).

Almost surely, 2^28757190 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28757190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43960320).

28757190 is an abundant number, since it is smaller than the sum of its proper divisors (59163450).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28757190 is a wasteful number, since it uses less digits than its factorization.

28757190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298.

The product of its (nonzero) digits is 35280, while the sum is 39.

The square root of 28757190 is about 5362.5730764252. The cubic root of 28757190 is about 306.3718193694.

It can be divided in two parts, 287571 and 90, that added together give a triangular number (287661 = T₇₅₈).

The spelling of 28757190 in words is "twenty-eight million, seven hundred fifty-seven thousand, one hundred ninety".