25397938 has 4 divisors (see below), whose sum is σ = 38096910. Its totient is φ = 12698968.

The previous prime is 25397923. The next prime is 25397951. The reversal of 25397938 is 83979352.

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

It can be written as a sum of positive squares in only one way, i.e., 25371369 + 26569 = 5037^2 + 163^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6349483 + ... + 6349486.

Almost surely, 2^25397938 is an apocalyptic number.

25397938 is a deficient number, since it is larger than the sum of its proper divisors (12698972).

25397938 is a wasteful number, since it uses less digits than its factorization.

25397938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12698971.

The product of its digits is 408240, while the sum is 46.

The square root of 25397938 is about 5039.6366932548. The cubic root of 25397938 is about 293.9450512020.

It can be divided in two parts, 25397 and 938, that added together give a triangular number (26335 = T₂₂₉).

The spelling of 25397938 in words is "twenty-five million, three hundred ninety-seven thousand, nine hundred thirty-eight".