38416991 has 4 divisors (see below), whose sum is σ = 40676832. Its totient is φ = 36157152.

The previous prime is 38416979. The next prime is 38416999. The reversal of 38416991 is 19961483.

38416991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 38416991 - 2¹⁸ = 38154847 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 (38416999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1129895 + ... + 1129928.

It is an arithmetic number, because the mean of its divisors is an integer number (10169208).

Almost surely, 2^38416991 is an apocalyptic number.

38416991 is a deficient number, since it is larger than the sum of its proper divisors (2259841).

38416991 is a wasteful number, since it uses less digits than its factorization.

38416991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2259840.

The product of its digits is 46656, while the sum is 41.

The square root of 38416991 is about 6198.1441577298. The cubic root of 38416991 is about 337.4228183821.

The spelling of 38416991 in words is "thirty-eight million, four hundred sixteen thousand, nine hundred ninety-one".