25505748 has 18 divisors (see below), whose sum is σ = 64472954. Its totient is φ = 8501904.

The previous prime is 25505723. The next prime is 25505783. The reversal of 25505748 is 84750552.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 23794884 + 1710864 = 4878^2 + 1308^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 708493 = 25505748 / (2 + 5 + 5 + 0 + 5 + 7 + 4 + 8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 354211 + ... + 354282.

Almost surely, 2^25505748 is an apocalyptic number.

It is an amenable number.

25505748 is an abundant number, since it is smaller than the sum of its proper divisors (38967206).

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

25505748 is a wasteful number, since it uses less digits than its factorization.

25505748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708503 (or 708498 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 36.

The square root of 25505748 is about 5050.3215739198. The cubic root of 25505748 is about 294.3603799520.

The spelling of 25505748 in words is "twenty-five million, five hundred five thousand, seven hundred forty-eight".