25808946 has 16 divisors (see below), whose sum is σ = 51719808. Its totient is φ = 8586000.

The previous prime is 25808929. The next prime is 25808947. The reversal of 25808946 is 64980852.

It is a super-2 number, since 2×25808946² = 1332203387261832, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25808898 and 25808907.

It is not an unprimeable number, because it can be changed into a prime (25808947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 730 + ... + 7221.

It is an arithmetic number, because the mean of its divisors is an integer number (3232488).

Almost surely, 2^25808946 is an apocalyptic number.

25808946 is an abundant number, since it is smaller than the sum of its proper divisors (25910862).

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

25808946 is a wasteful number, since it uses less digits than its factorization.

25808946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8497.

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 25808946 is about 5080.2505843708. The cubic root of 25808946 is about 295.5221853414.

The spelling of 25808946 in words is "twenty-five million, eight hundred eight thousand, nine hundred forty-six".