25172838 has 24 divisors (see below), whose sum is σ = 55357848. Its totient is φ = 8265312.

The previous prime is 25172803. The next prime is 25172843. The reversal of 25172838 is 83827152.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9231 + ... + 11642.

It is an arithmetic number, because the mean of its divisors is an integer number (2306577).

Almost surely, 2^25172838 is an apocalyptic number.

25172838 is an abundant number, since it is smaller than the sum of its proper divisors (30185010).

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

25172838 is a wasteful number, since it uses less digits than its factorization.

25172838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20948 (or 20945 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 25172838 is about 5017.2540298454. The cubic root of 25172838 is about 293.0740687224.

The spelling of 25172838 in words is "twenty-five million, one hundred seventy-two thousand, eight hundred thirty-eight".