38890857 has 4 divisors (see below), whose sum is σ = 51854480. Its totient is φ = 25927236.

The previous prime is 38890807. The next prime is 38890879. The reversal of 38890857 is 75809883.

It is a happy number.

38890857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 38890857 - 2¹⁸ = 38628713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38890807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6481807 + ... + 6481812.

It is an arithmetic number, because the mean of its divisors is an integer number (12963620).

Almost surely, 2^38890857 is an apocalyptic number.

It is an amenable number.

38890857 is a deficient number, since it is larger than the sum of its proper divisors (12963623).

38890857 is a wasteful number, since it uses less digits than its factorization.

38890857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12963622.

The product of its (nonzero) digits is 483840, while the sum is 48.

The square root of 38890857 is about 6236.2534425727. The cubic root of 38890857 is about 338.8045008827.

The spelling of 38890857 in words is "thirty-eight million, eight hundred ninety thousand, eight hundred fifty-seven".