25779432 has 32 divisors (see below), whose sum is σ = 73656000. Its totient is φ = 7365504.

The previous prime is 25779407. The next prime is 25779433. The reversal of 25779432 is 23497752.

It is a super-2 number, since 2×25779432² = 1329158228485248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25779433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76557 + ... + 76892.

It is an arithmetic number, because the mean of its divisors is an integer number (2301750).

Almost surely, 2^25779432 is an apocalyptic number.

It is an amenable number.

25779432 is an abundant number, since it is smaller than the sum of its proper divisors (47876568).

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

25779432 is a wasteful number, since it uses less digits than its factorization.

25779432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153465 (or 153461 counting only the distinct ones).

The product of its digits is 105840, while the sum is 39.

The square root of 25779432 is about 5077.3449754768. The cubic root of 25779432 is about 295.4094935560.

The spelling of 25779432 in words is "twenty-five million, seven hundred seventy-nine thousand, four hundred thirty-two".