25465440 has 384 divisors, whose sum is σ = 109734912. Its totient is φ = 4792320.

The previous prime is 25465421. The next prime is 25465459. The reversal of 25465440 is 4456452.

It is an interprime number because it is at equal distance from previous prime (25465421) and next prime (25465459).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 25465398 and 25465407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 480454 + ... + 480506.

It is an arithmetic number, because the mean of its divisors is an integer number (285768).

Almost surely, 2^25465440 is an apocalyptic number.

25465440 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 25465440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54867456).

25465440 is an abundant number, since it is smaller than the sum of its proper divisors (84269472).

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

25465440 is a wasteful number, since it uses less digits than its factorization.

25465440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 25465440 is about 5046.3293590490. The cubic root of 25465440 is about 294.2052340869.

25465440 divided by its sum of digits (30) gives a palindrome (848848).

The spelling of 25465440 in words is "twenty-five million, four hundred sixty-five thousand, four hundred forty".