25378820 has 24 divisors (see below), whose sum is σ = 53406528. Its totient is φ = 10130400.

The previous prime is 25378817. The next prime is 25378831. The reversal of 25378820 is 2887352.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11615 + ... + 13625.

It is an arithmetic number, because the mean of its divisors is an integer number (2225272).

Almost surely, 2^25378820 is an apocalyptic number.

25378820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25378820 is an abundant number, since it is smaller than the sum of its proper divisors (28027708).

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

25378820 is a wasteful number, since it uses less digits than its factorization.

25378820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2651 (or 2649 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 25378820 is about 5037.7395724670. The cubic root of 25378820 is about 293.8712781248.

The spelling of 25378820 in words is "twenty-five million, three hundred seventy-eight thousand, eight hundred twenty".