28253560 has 32 divisors (see below), whose sum is σ = 64382400. Its totient is φ = 11157120.

The previous prime is 28253549. The next prime is 28253567. The reversal of 28253560 is 6535282.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28253567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1311 + ... + 7630.

It is an arithmetic number, because the mean of its divisors is an integer number (2011950).

Almost surely, 2^28253560 is an apocalyptic number.

28253560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28253560 is an abundant number, since it is smaller than the sum of its proper divisors (36128840).

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

28253560 is a wasteful number, since it uses less digits than its factorization.

28253560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9031 (or 9027 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 28253560 is about 5315.4077924464. The cubic root of 28253560 is about 304.5727602241.

The spelling of 28253560 in words is "twenty-eight million, two hundred fifty-three thousand, five hundred sixty".