38685739 has 4 divisors (see below), whose sum is σ = 40019760. Its totient is φ = 37351720.

The previous prime is 38685721. The next prime is 38685749. The reversal of 38685739 is 93758683.

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 38685739 - 2¹³ = 38677547 is a prime.

It is a super-2 number, since 2×38685739² = 2993172803952242, 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 = 38685692 and 38685701.

It is not an unprimeable number, because it can be changed into a prime (38685749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 666967 + ... + 667024.

It is an arithmetic number, because the mean of its divisors is an integer number (10004940).

Almost surely, 2^38685739 is an apocalyptic number.

38685739 is a deficient number, since it is larger than the sum of its proper divisors (1334021).

38685739 is a wasteful number, since it uses less digits than its factorization.

38685739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1334020.

The product of its digits is 1088640, while the sum is 49.

The square root of 38685739 is about 6219.7860895693. The cubic root of 38685739 is about 338.2078101880.

The spelling of 38685739 in words is "thirty-eight million, six hundred eighty-five thousand, seven hundred thirty-nine".