25557028 has 36 divisors (see below), whose sum is σ = 52687152. Its totient is φ = 10814160.

The previous prime is 25557023. The next prime is 25557029. The reversal of 25557028 is 82075552.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 25556984 and 25557002.

It is not an unprimeable number, because it can be changed into a prime (25557023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15483 + ... + 17053.

It is an arithmetic number, because the mean of its divisors is an integer number (1463532).

Almost surely, 2^25557028 is an apocalyptic number.

25557028 is a gapful number since it is divisible by the number (28) 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 25557028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26343576).

25557028 is an abundant number, since it is smaller than the sum of its proper divisors (27130124).

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

25557028 is a wasteful number, since it uses less digits than its factorization.

25557028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1672 (or 1663 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 34.

The square root of 25557028 is about 5055.3959291039. The cubic root of 25557028 is about 294.5575210748.

The spelling of 25557028 in words is "twenty-five million, five hundred fifty-seven thousand, twenty-eight".