25990388 has 12 divisors (see below), whose sum is σ = 45566052. Its totient is φ = 12971520.

The previous prime is 25990387. The next prime is 25990411. The reversal of 25990388 is 88309952.

It can be written as a sum of positive squares in 2 ways, for example, as 25786084 + 204304 = 5078^2 + 452^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25990387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3323 + ... + 7938.

It is an arithmetic number, because the mean of its divisors is an integer number (3797171).

Almost surely, 2^25990388 is an apocalyptic number.

It is an amenable number.

25990388 is a deficient number, since it is larger than the sum of its proper divisors (19575664).

25990388 is a wasteful number, since it uses less digits than its factorization.

25990388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11842 (or 11840 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 25990388 is about 5098.0768923193. The cubic root of 25990388 is about 296.2130952741.

The spelling of 25990388 in words is "twenty-five million, nine hundred ninety thousand, three hundred eighty-eight".