28402560 has 96 divisors (see below), whose sum is σ = 98097480. Its totient is φ = 7572480.

The previous prime is 28402547. The next prime is 28402567. The reversal of 28402560 is 6520482.

It is a tau number, because it is divible by the number of its divisors (96).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28402567) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3295 + ... + 8225.

Almost surely, 2^28402560 is an apocalyptic number.

28402560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28402560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49048740).

28402560 is an abundant number, since it is smaller than the sum of its proper divisors (69694920).

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

28402560 is a wasteful number, since it uses less digits than its factorization.

28402560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4956 (or 4941 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 28402560 is about 5329.4052200973. The cubic root of 28402560 is about 305.1072273703.

The spelling of 28402560 in words is "twenty-eight million, four hundred two thousand, five hundred sixty".