25290369 has 12 divisors (see below), whose sum is σ = 39340756. Its totient is φ = 15563232.

The previous prime is 25290367. The next prime is 25290383. The reversal of 25290369 is 96309252.

25290369 is a `hidden beast` number, since 2 + 5 + 290 + 369 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13593969 + 11696400 = 3687^2 + 3420^2 .

It is not a de Polignac number, because 25290369 - 2¹ = 25290367 is a prime.

It is a super-2 number, since 2×25290369² = 1279205528312322, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (25290361) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107962 + ... + 108195.

Almost surely, 2^25290369 is an apocalyptic number.

It is an amenable number.

25290369 is a deficient number, since it is larger than the sum of its proper divisors (14050387).

25290369 is a wasteful number, since it uses less digits than its factorization.

25290369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216176 (or 216173 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 25290369 is about 5028.9530719624. The cubic root of 25290369 is about 293.5294778303.

The spelling of 25290369 in words is "twenty-five million, two hundred ninety thousand, three hundred sixty-nine".