38391949220 has 12 divisors (see below), whose sum is σ = 80623093404. Its totient is φ = 15356779680.

The previous prime is 38391949207. The next prime is 38391949231. The reversal of 38391949220 is 2294919383.

It can be written as a sum of positive squares in 2 ways, for example, as 9254824804 + 29137124416 = 96202^2 + 170696^2 .

It is a super-2 number, since 2×38391949220² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 959798711 + ... + 959798750.

It is an arithmetic number, because the mean of its divisors is an integer number (6718591117).

Almost surely, 2^38391949220 is an apocalyptic number.

It is an amenable number.

38391949220 is an abundant number, since it is smaller than the sum of its proper divisors (42231144184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38391949220 is a wasteful number, since it uses less digits than its factorization.

38391949220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1919597470 (or 1919597468 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 50.

The spelling of 38391949220 in words is "thirty-eight billion, three hundred ninety-one million, nine hundred forty-nine thousand, two hundred twenty".