25397472 has 48 divisors (see below), whose sum is σ = 67776912. Its totient is φ = 8325120.

The previous prime is 25397447. The next prime is 25397483. The reversal of 25397472 is 27479352.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 25397472.

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, 3688 + ... + 8024.

It is an arithmetic number, because the mean of its divisors is an integer number (1412019).

Almost surely, 2^25397472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25397472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33888456).

25397472 is an abundant number, since it is smaller than the sum of its proper divisors (42379440).

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

25397472 is a wasteful number, since it uses less digits than its factorization.

25397472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4411 (or 4403 counting only the distinct ones).

The product of its digits is 105840, while the sum is 39.

The square root of 25397472 is about 5039.5904595513. The cubic root of 25397472 is about 293.9432534283.

It can be divided in two parts, 253974 and 72, that multiplied together give a triangular number (18286128 = T₆₀₄₇).

The spelling of 25397472 in words is "twenty-five million, three hundred ninety-seven thousand, four hundred seventy-two".