25601628 has 24 divisors (see below), whose sum is σ = 64332688. Its totient is φ = 7877376.

The previous prime is 25601623. The next prime is 25601633. The reversal of 25601628 is 82610652.

It is an interprime number because it is at equal distance from previous prime (25601623) and next prime (25601633).

It is a junction number, because it is equal to n+sod(n) for n = 25601595 and 25601604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25601623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81901 + ... + 82212.

Almost surely, 2^25601628 is an apocalyptic number.

It is an amenable number.

25601628 is an abundant number, since it is smaller than the sum of its proper divisors (38731060).

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

25601628 is a wasteful number, since it uses less digits than its factorization.

25601628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164133 (or 164131 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 25601628 is about 5059.8051345877. The cubic root of 25601628 is about 294.7287672622.

The spelling of 25601628 in words is "twenty-five million, six hundred one thousand, six hundred twenty-eight".