38400293779 has 4 divisors (see below), whose sum is σ = 38402773920. Its totient is φ = 38397813640.

The previous prime is 38400293773. The next prime is 38400293791. The reversal of 38400293779 is 97739200483.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97739200483 = 263 ⋅371631941.

It is a cyclic number.

It is not a de Polignac number, because 38400293779 - 2¹⁷ = 38400162707 is a prime.

It is a super-2 number, since 2×38400293779² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38400293773) 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, 1216699 + ... + 1247860.

It is an arithmetic number, because the mean of its divisors is an integer number (9600693480).

Almost surely, 2^38400293779 is an apocalyptic number.

38400293779 is a deficient number, since it is larger than the sum of its proper divisors (2480141).

38400293779 is a wasteful number, since it uses less digits than its factorization.

38400293779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2480140.

The product of its (nonzero) digits is 2286144, while the sum is 52.

The spelling of 38400293779 in words is "thirty-eight billion, four hundred million, two hundred ninety-three thousand, seven hundred seventy-nine".