25402680 has 128 divisors (see below), whose sum is σ = 86803200. Its totient is φ = 6604416.

The previous prime is 25402679. The next prime is 25402693. The reversal of 25402680 is 8620452.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 46167 + ... + 46713.

It is an arithmetic number, because the mean of its divisors is an integer number (678150).

Almost surely, 2^25402680 is an apocalyptic number.

25402680 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 25402680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43401600).

25402680 is an abundant number, since it is smaller than the sum of its proper divisors (61400520).

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

25402680 is a wasteful number, since it uses less digits than its factorization.

25402680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610 (or 600 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 25402680 is about 5040.1071417183. The cubic root of 25402680 is about 293.9633440347.

The spelling of 25402680 in words is "twenty-five million, four hundred two thousand, six hundred eighty".