25138834 has 16 divisors (see below), whose sum is σ = 43213248. Its totient is φ = 10744272.

The previous prime is 25138823. The next prime is 25138837. The reversal of 25138834 is 43883152.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 25138834.

It is not an unprimeable number, because it can be changed into a prime (25138837) 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, 3297 + ... + 7819.

It is an arithmetic number, because the mean of its divisors is an integer number (2700828).

Almost surely, 2^25138834 is an apocalyptic number.

25138834 is a deficient number, since it is larger than the sum of its proper divisors (18074414).

25138834 is a wasteful number, since it uses less digits than its factorization.

25138834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4929.

The product of its digits is 23040, while the sum is 34.

The square root of 25138834 is about 5013.8641784556. The cubic root of 25138834 is about 292.9420457155.

The spelling of 25138834 in words is "twenty-five million, one hundred thirty-eight thousand, eight hundred thirty-four".