25616620 has 48 divisors (see below), whose sum is σ = 57970080. Its totient is φ = 9473024.

The previous prime is 25616611. The next prime is 25616621. The reversal of 25616620 is 2661652.

It is a super-2 number, since 2×25616620² = 1312422440448800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25616621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19422 + ... + 20698.

It is an arithmetic number, because the mean of its divisors is an integer number (1207710).

Almost surely, 2^25616620 is an apocalyptic number.

25616620 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 25616620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28985040).

25616620 is an abundant number, since it is smaller than the sum of its proper divisors (32353460).

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

25616620 is a wasteful number, since it uses less digits than its factorization.

25616620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362 (or 1360 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 25616620 is about 5061.2863977451. The cubic root of 25616620 is about 294.7862858892.

The spelling of 25616620 in words is "twenty-five million, six hundred sixteen thousand, six hundred twenty".