38379729 has 4 divisors (see below), whose sum is σ = 51172976. Its totient is φ = 25586484.

The previous prime is 38379721. The next prime is 38379743. The reversal of 38379729 is 92797383.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 38379729 - 2³ = 38379721 is a prime.

It is a super-2 number, since 2×38379729² = 2946007196226882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38379721) 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, 6396619 + ... + 6396624.

It is an arithmetic number, because the mean of its divisors is an integer number (12793244).

Almost surely, 2^38379729 is an apocalyptic number.

It is an amenable number.

38379729 is a deficient number, since it is larger than the sum of its proper divisors (12793247).

38379729 is a wasteful number, since it uses less digits than its factorization.

38379729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12793246.

The product of its digits is 571536, while the sum is 48.

The square root of 38379729 is about 6195.1375287398. The cubic root of 38379729 is about 337.3136903119.

The spelling of 38379729 in words is "thirty-eight million, three hundred seventy-nine thousand, seven hundred twenty-nine".