38890925 has 6 divisors (see below), whose sum is σ = 48224778. Its totient is φ = 31112720.

The previous prime is 38890921. The next prime is 38890981. The reversal of 38890925 is 52909883.

It can be written as a sum of positive squares in 3 ways, for example, as 784996 + 38105929 = 886^2 + 6173^2 .

It is not a de Polignac number, because 38890925 - 2² = 38890921 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38890921) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 777794 + ... + 777843.

It is an arithmetic number, because the mean of its divisors is an integer number (8037463).

Almost surely, 2^38890925 is an apocalyptic number.

It is an amenable number.

38890925 is a deficient number, since it is larger than the sum of its proper divisors (9333853).

38890925 is a wasteful number, since it uses less digits than its factorization.

38890925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1555647 (or 1555642 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 38890925 is about 6236.2588945617. The cubic root of 38890925 is about 338.8046983472.

The spelling of 38890925 in words is "thirty-eight million, eight hundred ninety thousand, nine hundred twenty-five".