25690572 has 18 divisors (see below), whose sum is σ = 64940148. Its totient is φ = 8563512.

The previous prime is 25690571. The next prime is 25690583. The reversal of 25690572 is 27509652.

25690572 is a `hidden beast` number, since 25 + 69 + 0 + 572 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 713627 = 25690572 / (2 + 5 + 6 + 9 + 0 + 5 + 7 + 2).

It is not an unprimeable number, because it can be changed into a prime (25690571) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 356778 + ... + 356849.

It is an arithmetic number, because the mean of its divisors is an integer number (3607786).

Almost surely, 2^25690572 is an apocalyptic number.

It is an amenable number.

25690572 is an abundant number, since it is smaller than the sum of its proper divisors (39249576).

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

25690572 is a wasteful number, since it uses less digits than its factorization.

25690572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713637 (or 713632 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 25690572 is about 5068.5867852884. The cubic root of 25690572 is about 295.0696838159.

It can be divided in two parts, 25690 and 572, that added together give a palindrome (26262).

The spelling of 25690572 in words is "twenty-five million, six hundred ninety thousand, five hundred seventy-two".