25397378 has 4 divisors (see below), whose sum is σ = 38096070. Its totient is φ = 12698688.

The previous prime is 25397353. The next prime is 25397381. The reversal of 25397378 is 87379352.

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., 18037009 + 7360369 = 4247^2 + 2713^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6349343 + ... + 6349346.

Almost surely, 2^25397378 is an apocalyptic number.

25397378 is a deficient number, since it is larger than the sum of its proper divisors (12698692).

25397378 is a wasteful number, since it uses less digits than its factorization.

25397378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12698691.

The product of its digits is 317520, while the sum is 44.

The square root of 25397378 is about 5039.5811333880. The cubic root of 25397378 is about 293.9428907846.

The spelling of 25397378 in words is "twenty-five million, three hundred ninety-seven thousand, three hundred seventy-eight".