38990189 has 4 divisors (see below), whose sum is σ = 44560224. Its totient is φ = 33420156.

The previous prime is 38990183. The next prime is 38990233. The reversal of 38990189 is 98109983.

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 38990189 - 2⁸ = 38989933 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 (38990183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2785007 + ... + 2785020.

It is an arithmetic number, because the mean of its divisors is an integer number (11140056).

Almost surely, 2^38990189 is an apocalyptic number.

It is an amenable number.

38990189 is a deficient number, since it is larger than the sum of its proper divisors (5570035).

38990189 is an equidigital number, since it uses as much as digits as its factorization.

38990189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5570034.

The product of its (nonzero) digits is 139968, while the sum is 47.

The square root of 38990189 is about 6244.2124403322. The cubic root of 38990189 is about 339.0927050144.

The spelling of 38990189 in words is "thirty-eight million, nine hundred ninety thousand, one hundred eighty-nine".