25416840 has 64 divisors (see below), whose sum is σ = 79574400. Its totient is φ = 6482432.

The previous prime is 25416823. The next prime is 25416857. The reversal of 25416840 is 4861452.

It is an interprime number because it is at equal distance from previous prime (25416823) and next prime (25416857).

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 = 25416798 and 25416807.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1845 + ... + 7364.

It is an arithmetic number, because the mean of its divisors is an integer number (1243350).

Almost surely, 2^25416840 is an apocalyptic number.

25416840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25416840 is an abundant number, since it is smaller than the sum of its proper divisors (54157560).

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

25416840 is a wasteful number, since it uses less digits than its factorization.

25416840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9246 (or 9242 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 25416840 is about 5041.5116780585. The cubic root of 25416840 is about 294.0179543850.

The spelling of 25416840 in words is "twenty-five million, four hundred sixteen thousand, eight hundred forty".