25447464 has 72 divisors (see below), whose sum is σ = 80183610. Its totient is φ = 7269696.

The previous prime is 25447451. The next prime is 25447501. The reversal of 25447464 is 46474452.

It can be written as a sum of positive squares in only one way, i.e., 17994564 + 7452900 = 4242^2 + 2730^2 .

It is a tau number, because it is divible by the number of its divisors (72).

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 17 ways as a sum of consecutive naturals, for example, 79 + ... + 7134.

Almost surely, 2^25447464 is an apocalyptic number.

25447464 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 25447464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40091805).

25447464 is an abundant number, since it is smaller than the sum of its proper divisors (54736146).

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

25447464 is a wasteful number, since it uses less digits than its factorization.

25447464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7239 (or 7225 counting only the distinct ones).

The product of its digits is 107520, while the sum is 36.

The square root of 25447464 is about 5044.5479480326. The cubic root of 25447464 is about 294.1359915084.

The spelling of 25447464 in words is "twenty-five million, four hundred forty-seven thousand, four hundred sixty-four".