38409731 has 8 divisors (see below), whose sum is σ = 38987760. Its totient is φ = 37836288.

The previous prime is 38409727. The next prime is 38409733. The reversal of 38409731 is 13790483.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 38409731 - 2² = 38409727 is a prime.

It is a super-2 number, since 2×38409731² = 2950614870984722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 38409691 and 38409700.

It is not an unprimeable number, because it can be changed into a prime (38409733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18035 + ... + 20051.

It is an arithmetic number, because the mean of its divisors is an integer number (4873470).

Almost surely, 2^38409731 is an apocalyptic number.

38409731 is a deficient number, since it is larger than the sum of its proper divisors (578029).

38409731 is a wasteful number, since it uses less digits than its factorization.

38409731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2293.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 38409731 is about 6197.5584708819. The cubic root of 38409731 is about 337.4015617807.

The spelling of 38409731 in words is "thirty-eight million, four hundred nine thousand, seven hundred thirty-one".