38840330721 has 16 divisors (see below), whose sum is σ = 53633784960. Its totient is φ = 24972245760.

The previous prime is 38840330717. The next prime is 38840330761. The reversal of 38840330721 is 12703304883.

It is not a de Polignac number, because 38840330721 - 2² = 38840330717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38840330721.

It is not an unprimeable number, because it can be changed into a prime (38840330701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176725 + ... + 330018.

It is an arithmetic number, because the mean of its divisors is an integer number (3352111560).

Almost surely, 2^38840330721 is an apocalyptic number.

It is an amenable number.

38840330721 is a deficient number, since it is larger than the sum of its proper divisors (14793454239).

38840330721 is a wasteful number, since it uses less digits than its factorization.

38840330721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507656.

The product of its (nonzero) digits is 96768, while the sum is 39.

The spelling of 38840330721 in words is "thirty-eight billion, eight hundred forty million, three hundred thirty thousand, seven hundred twenty-one".