25709994 has 16 divisors (see below), whose sum is σ = 57133440. Its totient is φ = 8569980.

The previous prime is 25709969. The next prime is 25710011. The reversal of 25709994 is 49990752.

It is a super-2 number, since 2×25709994² = 1322007582960072, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 238002 + ... + 238109.

It is an arithmetic number, because the mean of its divisors is an integer number (3570840).

Almost surely, 2^25709994 is an apocalyptic number.

25709994 is an abundant number, since it is smaller than the sum of its proper divisors (31423446).

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

25709994 is a wasteful number, since it uses less digits than its factorization.

25709994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476122 (or 476116 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The square root of 25709994 is about 5070.5023419776. The cubic root of 25709994 is about 295.1440223689.

The spelling of 25709994 in words is "twenty-five million, seven hundred nine thousand, nine hundred ninety-four".