38999191 has 48 divisors (see below), whose sum is σ = 54425088. Its totient is φ = 27086400.

The previous prime is 38999189. The next prime is 38999197. The reversal of 38999191 is 19199983.

It is not a de Polignac number, because 38999191 - 2¹ = 38999189 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 (38999197) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 639301 + ... + 639361.

It is an arithmetic number, because the mean of its divisors is an integer number (1133856).

Almost surely, 2^38999191 is an apocalyptic number.

38999191 is a deficient number, since it is larger than the sum of its proper divisors (15425897).

38999191 is a wasteful number, since it uses less digits than its factorization.

38999191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 121 counting only the distinct ones).

The product of its digits is 157464, while the sum is 49.

The square root of 38999191 is about 6244.9332262243. The cubic root of 38999191 is about 339.1187994219.

The spelling of 38999191 in words is "thirty-eight million, nine hundred ninety-nine thousand, one hundred ninety-one".