25813690 has 48 divisors (see below), whose sum is σ = 54583200. Its totient is φ = 8763552.

The previous prime is 25813663. The next prime is 25813699. The reversal of 25813690 is 9631852.

It is a super-2 number, since 2×25813690² = 1332693182832200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25813699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67921 + ... + 68299.

It is an arithmetic number, because the mean of its divisors is an integer number (1137150).

Almost surely, 2^25813690 is an apocalyptic number.

25813690 is an abundant number, since it is smaller than the sum of its proper divisors (28769510).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25813690 is a wasteful number, since it uses less digits than its factorization.

25813690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539 (or 532 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 25813690 is about 5080.7174690195. The cubic root of 25813690 is about 295.5402910963.

The spelling of 25813690 in words is "twenty-five million, eight hundred thirteen thousand, six hundred ninety".