25645448 has 8 divisors (see below), whose sum is σ = 48085230. Its totient is φ = 12822720.

The previous prime is 25645447. The next prime is 25645457. The reversal of 25645448 is 84454652.

It can be written as a sum of positive squares in only one way, i.e., 25180324 + 465124 = 5018^2 + 682^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (25645447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1602833 + ... + 1602848.

Almost surely, 2^25645448 is an apocalyptic number.

It is an amenable number.

25645448 is a deficient number, since it is larger than the sum of its proper divisors (22439782).

25645448 is a wasteful number, since it uses less digits than its factorization.

25645448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3205687 (or 3205683 counting only the distinct ones).

The product of its digits is 153600, while the sum is 38.

The square root of 25645448 is about 5064.1334895518. The cubic root of 25645448 is about 294.8968249744.

The spelling of 25645448 in words is "twenty-five million, six hundred forty-five thousand, four hundred forty-eight".