3888220720 has 40 divisors (see below), whose sum is σ = 9051746544. Its totient is φ = 1553286912.

The previous prime is 3888220631. The next prime is 3888220723. The reversal of 3888220720 is 270228883.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (3888220723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32082 + ... + 93838.

Almost surely, 2^3888220720 is an apocalyptic number.

It is an amenable number.

3888220720 is an abundant number, since it is smaller than the sum of its proper divisors (5163525824).

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

3888220720 is a wasteful number, since it uses less digits than its factorization.

3888220720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62557 (or 62551 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 3888220720 is about 62355.5989466864. The cubic root of 3888220720 is about 1572.4745916228.

The spelling of 3888220720 in words is "three billion, eight hundred eighty-eight million, two hundred twenty thousand, seven hundred twenty".