25438464 has 108 divisors (see below), whose sum is σ = 74959612. Its totient is φ = 8294400.

The previous prime is 25438417. The next prime is 25438471. The reversal of 25438464 is 46483452.

It can be written as a sum of positive squares in 2 ways, for example, as 518400 + 24920064 = 720^2 + 4992^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 140454 + ... + 140634.

Almost surely, 2^25438464 is an apocalyptic number.

25438464 is a gapful number since it is divisible by the number (24) 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 25438464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37479806).

25438464 is an abundant number, since it is smaller than the sum of its proper divisors (49521148).

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

25438464 is a wasteful number, since it uses less digits than its factorization.

25438464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264 (or 247 counting only the distinct ones).

The product of its digits is 92160, while the sum is 36.

The square root of 25438464 is about 5043.6558169645. The cubic root of 25438464 is about 294.1013117453.

The spelling of 25438464 in words is "twenty-five million, four hundred thirty-eight thousand, four hundred sixty-four".