25839138 has 32 divisors (see below), whose sum is σ = 55875456. Its totient is φ = 7918848.

The previous prime is 25839137. The next prime is 25839139. The reversal of 25839138 is 83193852.

It is an interprime number because it is at equal distance from previous prime (25839137) and next prime (25839139).

It is a super-2 number, since 2×25839138² = 1335322105166088, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 25839096 and 25839105.

It is not an unprimeable number, because it can be changed into a prime (25839131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25795 + ... + 26777.

It is an arithmetic number, because the mean of its divisors is an integer number (1746108).

Almost surely, 2^25839138 is an apocalyptic number.

25839138 is an abundant number, since it is smaller than the sum of its proper divisors (30036318).

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

25839138 is a wasteful number, since it uses less digits than its factorization.

25839138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338.

The product of its digits is 51840, while the sum is 39.

The square root of 25839138 is about 5083.2212228074. The cubic root of 25839138 is about 295.6373770383.

The spelling of 25839138 in words is "twenty-five million, eight hundred thirty-nine thousand, one hundred thirty-eight".