25319994 has 32 divisors (see below), whose sum is σ = 59744256. Its totient is φ = 7000560.

The previous prime is 25319971. The next prime is 25320011. The reversal of 25319994 is 49991352.

It is a super-2 number, since 2×25319994² = 1282204192320072, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8422 + ... + 11025.

It is an arithmetic number, because the mean of its divisors is an integer number (1867008).

Almost surely, 2^25319994 is an apocalyptic number.

25319994 is an abundant number, since it is smaller than the sum of its proper divisors (34424262).

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

25319994 is a wasteful number, since it uses less digits than its factorization.

25319994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19490.

The product of its digits is 87480, while the sum is 42.

The square root of 25319994 is about 5031.8976539671. The cubic root of 25319994 is about 293.6440460490.

The spelling of 25319994 in words is "twenty-five million, three hundred nineteen thousand, nine hundred ninety-four".