25684490 has 16 divisors (see below), whose sum is σ = 49788648. Its totient is φ = 9483456.

The previous prime is 25684481. The next prime is 25684493. The reversal of 25684490 is 9448652.

It can be written as a sum of positive squares in 4 ways, for example, as 22287841 + 3396649 = 4721^2 + 1843^2 .

It is not an unprimeable number, because it can be changed into a prime (25684493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98657 + ... + 98916.

Almost surely, 2^25684490 is an apocalyptic number.

25684490 is a deficient number, since it is larger than the sum of its proper divisors (24104158).

25684490 is a wasteful number, since it uses less digits than its factorization.

25684490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197593.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 25684490 is about 5067.9867797775. The cubic root of 25684490 is about 295.0463969923.

The spelling of 25684490 in words is "twenty-five million, six hundred eighty-four thousand, four hundred ninety".