3880428720 has 160 divisors (see below), whose sum is σ = 14191472640. Its totient is φ = 858332160.

The previous prime is 3880428709. The next prime is 3880428757. The reversal of 3880428720 is 278240883.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14826 + ... + 89334.

It is an arithmetic number, because the mean of its divisors is an integer number (88696704).

Almost surely, 2^3880428720 is an apocalyptic number.

3880428720 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 3880428720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7095736320).

3880428720 is an abundant number, since it is smaller than the sum of its proper divisors (10311043920).

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

3880428720 is a wasteful number, since it uses less digits than its factorization.

3880428720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74563 (or 74557 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 42.

The square root of 3880428720 is about 62293.0872569341. The cubic root of 3880428720 is about 1571.4234753711.

The spelling of 3880428720 in words is "three billion, eight hundred eighty million, four hundred twenty-eight thousand, seven hundred twenty".