3939220920 has 128 divisors (see below), whose sum is σ = 11938752000. Its totient is φ = 1039762944.

The previous prime is 3939220877. The next prime is 3939220921. The reversal of 3939220920 is 290229393.

It is a super-2 number, since 2×3939220920² = 31034922913131292800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3939220921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6996559 + ... + 6997121.

It is an arithmetic number, because the mean of its divisors is an integer number (93271500).

Almost surely, 2^3939220920 is an apocalyptic number.

3939220920 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3939220920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5969376000).

3939220920 is an abundant number, since it is smaller than the sum of its proper divisors (7999531080).

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

3939220920 is a wasteful number, since it uses less digits than its factorization.

3939220920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069 (or 1065 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 39.

The square root of 3939220920 is about 62763.2131108661. The cubic root of 3939220920 is about 1579.3199177493.

The spelling of 3939220920 in words is "three billion, nine hundred thirty-nine million, two hundred twenty thousand, nine hundred twenty".