38991914 has 32 divisors (see below), whose sum is σ = 70217280. Its totient is φ = 16042752.

The previous prime is 38991913. The next prime is 38991917. The reversal of 38991914 is 41919983.

It is a super-3 number, since 3×38991914³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (38991913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6077 + ... + 10719.

It is an arithmetic number, because the mean of its divisors is an integer number (2194290).

Almost surely, 2^38991914 is an apocalyptic number.

38991914 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

38991914 is a deficient number, since it is larger than the sum of its proper divisors (31225366).

38991914 is a wasteful number, since it uses less digits than its factorization.

38991914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4694.

The product of its digits is 69984, while the sum is 44.

The square root of 38991914 is about 6244.3505667123. The cubic root of 38991914 is about 339.0977056424.

The spelling of 38991914 in words is "thirty-eight million, nine hundred ninety-one thousand, nine hundred fourteen".