3899518788 has 72 divisors (see below), whose sum is σ = 10073717920. Its totient is φ = 1173171120.

The previous prime is 3899518787. The next prime is 3899518823. The reversal of 3899518788 is 8878159983.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is not an unprimeable number, because it can be changed into a prime (3899518787) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28054023 + ... + 28054161.

Almost surely, 2^3899518788 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3899518788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5036858960).

3899518788 is an abundant number, since it is smaller than the sum of its proper divisors (6174199132).

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

3899518788 is an equidigital number, since it uses as much as digits as its factorization.

3899518788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446 (or 155 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 66.

The square root of 3899518788 is about 62446.1270856728. The cubic root of 3899518788 is about 1573.9961740539.

The spelling of 3899518788 in words is "three billion, eight hundred ninety-nine million, five hundred eighteen thousand, seven hundred eighty-eight".