38890510849 has 4 divisors (see below), whose sum is σ = 38890905264. Its totient is φ = 38890116436.

The previous prime is 38890510843. The next prime is 38890510861. The reversal of 38890510849 is 94801509883.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 38890510849 - 2⁷ = 38890510721 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38890510849.

It is not an unprimeable number, because it can be changed into a prime (38890510843) 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, 98154 + ... + 295660.

It is an arithmetic number, because the mean of its divisors is an integer number (9722726316).

Almost surely, 2^38890510849 is an apocalyptic number.

It is an amenable number.

38890510849 is a deficient number, since it is larger than the sum of its proper divisors (394415).

38890510849 is a wasteful number, since it uses less digits than its factorization.

38890510849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394414.

The product of its (nonzero) digits is 2488320, while the sum is 55.

The spelling of 38890510849 in words is "thirty-eight billion, eight hundred ninety million, five hundred ten thousand, eight hundred forty-nine".