25133940 has 144 divisors (see below), whose sum is σ = 85857408. Its totient is φ = 5905152.

The previous prime is 25133921. The next prime is 25133947. The reversal of 25133940 is 4933152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25133947) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 53587 + ... + 54053.

It is an arithmetic number, because the mean of its divisors is an integer number (596232).

Almost surely, 2^25133940 is an apocalyptic number.

25133940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25133940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42928704).

25133940 is an abundant number, since it is smaller than the sum of its proper divisors (60723468).

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

25133940 is a wasteful number, since it uses less digits than its factorization.

25133940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518 (or 513 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 25133940 is about 5013.3761079735. The cubic root of 25133940 is about 292.9230346055.

It can be divided in two parts, 251 and 33940, that added together give a triangular number (34191 = T₂₆₁).

The spelling of 25133940 in words is "twenty-five million, one hundred thirty-three thousand, nine hundred forty".