25724772 has 18 divisors (see below), whose sum is σ = 65026598. Its totient is φ = 8574912.

The previous prime is 25724759. The next prime is 25724773. The reversal of 25724772 is 27742752.

It can be written as a sum of positive squares in only one way, i.e., 22982436 + 2742336 = 4794^2 + 1656^2 .

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

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct 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: 714577 = 25724772 / (2 + 5 + 7 + 2 + 4 + 7 + 7 + 2).

It is not an unprimeable number, because it can be changed into a prime (25724773) 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, 357253 + ... + 357324.

Almost surely, 2^25724772 is an apocalyptic number.

It is an amenable number.

25724772 is an abundant number, since it is smaller than the sum of its proper divisors (39301826).

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

25724772 is a wasteful number, since it uses less digits than its factorization.

25724772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714587 (or 714582 counting only the distinct ones).

The product of its digits is 54880, while the sum is 36.

The square root of 25724772 is about 5071.9593846954. The cubic root of 25724772 is about 295.2005607322.

The spelling of 25724772 in words is "twenty-five million, seven hundred twenty-four thousand, seven hundred seventy-two".