25938649 has 9 divisors (see below), whose sum is σ = 28572789. Its totient is φ = 23529660.

The previous prime is 25938637. The next prime is 25938659. The reversal of 25938649 is 94683952.

The square root of 25938649 is 5093.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 25938649 - 2⁹ = 25938137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25938599 and 25938608.

It is not an unprimeable number, because it can be changed into a prime (25938659) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 55792 + ... + 56254.

Almost surely, 2^25938649 is an apocalyptic number.

25938649 is the 5093-rd square number.

25938649 is the 2547-th centered octagonal number.

It is an amenable number.

25938649 is a deficient number, since it is larger than the sum of its proper divisors (2634140).

25938649 is an frugal number, since it uses more digits than its factorization.

25938649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948 (or 474 counting only the distinct ones).

The product of its digits is 466560, while the sum is 46.

The cubic root of 25938649 is about 296.0164078134.

The spelling of 25938649 in words is "twenty-five million, nine hundred thirty-eight thousand, six hundred forty-nine".