38932991 has 6 divisors (see below), whose sum is σ = 40015080. Its totient is φ = 37879416.

The previous prime is 38932969. The next prime is 38933003. The reversal of 38932991 is 19923983.

It is not a de Polignac number, because 38932991 - 2¹⁰ = 38931967 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 (38932291) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12851 + ... + 15588.

It is an arithmetic number, because the mean of its divisors is an integer number (6669180).

Almost surely, 2^38932991 is an apocalyptic number.

38932991 is a deficient number, since it is larger than the sum of its proper divisors (1082089).

38932991 is an equidigital number, since it uses as much as digits as its factorization.

38932991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28513 (or 28476 counting only the distinct ones).

The product of its digits is 104976, while the sum is 44.

The square root of 38932991 is about 6239.6306781732. The cubic root of 38932991 is about 338.9268092935.

The spelling of 38932991 in words is "thirty-eight million, nine hundred thirty-two thousand, nine hundred ninety-one".