25691072 has 28 divisors (see below), whose sum is σ = 55616856. Its totient is φ = 11677440.

The previous prime is 25691047. The next prime is 25691077. The reversal of 25691072 is 27019652.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25691077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17543 + ... + 18950.

Almost surely, 2^25691072 is an apocalyptic number.

25691072 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

25691072 is an abundant number, since it is smaller than the sum of its proper divisors (29925784).

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

25691072 is a wasteful number, since it uses less digits than its factorization.

25691072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36516 (or 36506 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 25691072 is about 5068.6361084615. The cubic root of 25691072 is about 295.0715980575.

The spelling of 25691072 in words is "twenty-five million, six hundred ninety-one thousand, seventy-two".