25669940 has 24 divisors (see below), whose sum is σ = 54093312. Its totient is φ = 10232480.

The previous prime is 25669937. The next prime is 25669957. The reversal of 25669940 is 4996652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4157 + ... + 8283.

It is an arithmetic number, because the mean of its divisors is an integer number (2253888).

Almost surely, 2^25669940 is an apocalyptic number.

25669940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25669940 is an abundant number, since it is smaller than the sum of its proper divisors (28423372).

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

25669940 is a wasteful number, since it uses less digits than its factorization.

25669940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4447 (or 4445 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 25669940 is about 5066.5510951731. The cubic root of 25669940 is about 294.9906728833.

The spelling of 25669940 in words is "twenty-five million, six hundred sixty-nine thousand, nine hundred forty".