25575880 has 64 divisors (see below), whose sum is σ = 64514880. Its totient is φ = 9043200.

The previous prime is 25575859. The next prime is 25575887. The reversal of 25575880 is 8857552.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (25575887) 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, 15495 + ... + 17065.

It is an arithmetic number, because the mean of its divisors is an integer number (1008045).

Almost surely, 2^25575880 is an apocalyptic number.

25575880 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 25575880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32257440).

25575880 is an abundant number, since it is smaller than the sum of its proper divisors (38939000).

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

25575880 is a wasteful number, since it uses less digits than its factorization.

25575880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1630 (or 1626 counting only the distinct ones).

The product of its (nonzero) digits is 112000, while the sum is 40.

The square root of 25575880 is about 5057.2601277767. The cubic root of 25575880 is about 294.6299295146.

The spelling of 25575880 in words is "twenty-five million, five hundred seventy-five thousand, eight hundred eighty".