25208172 has 90 divisors (see below), whose sum is σ = 72547244. Its totient is φ = 7626960.

The previous prime is 25208167. The next prime is 25208173. The reversal of 25208172 is 27180252.

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

It is not an unprimeable number, because it can be changed into a prime (25208173) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 38883 + ... + 39525.

Almost surely, 2^25208172 is an apocalyptic number.

25208172 is a gapful number since it is divisible by the number (22) 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 25208172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36273622).

25208172 is an abundant number, since it is smaller than the sum of its proper divisors (47339072).

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

25208172 is a wasteful number, since it uses less digits than its factorization.

25208172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681 (or 659 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 25208172 is about 5020.7740439100. The cubic root of 25208172 is about 293.2111296521.

The spelling of 25208172 in words is "twenty-five million, two hundred eight thousand, one hundred seventy-two".