25812972 has 48 divisors (see below), whose sum is σ = 68073600. Its totient is φ = 8456400.

The previous prime is 25812967. The next prime is 25812979. The reversal of 25812972 is 27921852.

25812972 is a `hidden beast` number, since 2 + 581 + 2 + 9 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (25812979) 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, 4347 + ... + 8397.

It is an arithmetic number, because the mean of its divisors is an integer number (1418200).

Almost surely, 2^25812972 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25812972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34036800).

25812972 is an abundant number, since it is smaller than the sum of its proper divisors (42260628).

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

25812972 is a wasteful number, since it uses less digits than its factorization.

25812972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4123 (or 4115 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 25812972 is about 5080.6468092163. The cubic root of 25812972 is about 295.5375509496.

The spelling of 25812972 in words is "twenty-five million, eight hundred twelve thousand, nine hundred seventy-two".