25438620 has 24 divisors (see below), whose sum is σ = 71228304. Its totient is φ = 6783616.

The previous prime is 25438619. The next prime is 25438643. The reversal of 25438620 is 2683452.

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

It is a congruent 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, 211929 + ... + 212048.

It is an arithmetic number, because the mean of its divisors is an integer number (2967846).

Almost surely, 2^25438620 is an apocalyptic number.

25438620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25438620 is an abundant number, since it is smaller than the sum of its proper divisors (45789684).

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

25438620 is a wasteful number, since it uses less digits than its factorization.

25438620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423989 (or 423987 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 25438620 is about 5043.6712819136. The cubic root of 25438620 is about 294.1019129309.

The spelling of 25438620 in words is "twenty-five million, four hundred thirty-eight thousand, six hundred twenty".