25457340 has 96 divisors (see below), whose sum is σ = 76043520. Its totient is φ = 6345216.

The previous prime is 25457323. The next prime is 25457371. The reversal of 25457340 is 4375452.

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 = 25457298 and 25457307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 156099 + ... + 156261.

It is an arithmetic number, because the mean of its divisors is an integer number (792120).

Almost surely, 2^25457340 is an apocalyptic number.

25457340 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 25457340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38021760).

25457340 is an abundant number, since it is smaller than the sum of its proper divisors (50586180).

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

25457340 is a wasteful number, since it uses less digits than its factorization.

25457340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331 (or 329 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 30.

The square root of 25457340 is about 5045.5267316703. The cubic root of 25457340 is about 294.1740373603.

The spelling of 25457340 in words is "twenty-five million, four hundred fifty-seven thousand, three hundred forty".