25808938 has 4 divisors (see below), whose sum is σ = 38713410. Its totient is φ = 12904468.

The previous prime is 25808929. The next prime is 25808947. The reversal of 25808938 is 83980852.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (25808929) and next prime (25808947).

It can be written as a sum of positive squares in only one way, i.e., 21780889 + 4028049 = 4667^2 + 2007^2 .

It is a super-2 number, since 2×25808938² = 1332202561375688, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25808894 and 25808903.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6452233 + ... + 6452236.

Almost surely, 2^25808938 is an apocalyptic number.

25808938 is a deficient number, since it is larger than the sum of its proper divisors (12904472).

25808938 is a wasteful number, since it uses less digits than its factorization.

25808938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12904471.

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 25808938 is about 5080.2497970080. The cubic root of 25808938 is about 295.5221548070.

The spelling of 25808938 in words is "twenty-five million, eight hundred eight thousand, nine hundred thirty-eight".