38991477 has 32 divisors (see below), whose sum is σ = 63385600. Its totient is φ = 20824128.

The previous prime is 38991473. The next prime is 38991479. The reversal of 38991477 is 77419983.

It is not a de Polignac number, because 38991477 - 2² = 38991473 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 (38991473) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30903 + ... + 32139.

It is an arithmetic number, because the mean of its divisors is an integer number (1980800).

Almost surely, 2^38991477 is an apocalyptic number.

It is an amenable number.

38991477 is a deficient number, since it is larger than the sum of its proper divisors (24394123).

38991477 is a wasteful number, since it uses less digits than its factorization.

38991477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345.

The product of its digits is 381024, while the sum is 48.

The square root of 38991477 is about 6244.3155749850. The cubic root of 38991477 is about 339.0964388306.

The spelling of 38991477 in words is "thirty-eight million, nine hundred ninety-one thousand, four hundred seventy-seven".