38990111 has 4 divisors (see below), whose sum is σ = 39038424. Its totient is φ = 38941800.

The previous prime is 38990101. The next prime is 38990137. The reversal of 38990111 is 11109983.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 38990111 - 2¹⁸ = 38727967 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 (38990101) 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, 22925 + ... + 24566.

It is an arithmetic number, because the mean of its divisors is an integer number (9759606).

Almost surely, 2^38990111 is an apocalyptic number.

38990111 is a deficient number, since it is larger than the sum of its proper divisors (48313).

38990111 is an equidigital number, since it uses as much as digits as its factorization.

38990111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48312.

The product of its (nonzero) digits is 1944, while the sum is 32.

The square root of 38990111 is about 6244.2061945455. The cubic root of 38990111 is about 339.0924788956.

The spelling of 38990111 in words is "thirty-eight million, nine hundred ninety thousand, one hundred eleven".