3909899880 has 192 divisors, whose sum is σ = 12923089920. Its totient is φ = 1025088000.

The previous prime is 3909899863. The next prime is 3909899899. The reversal of 3909899880 is 889989093.

3909899880 is a `hidden beast` number, since 390 + 9 + 89 + 98 + 80 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6944479 + ... + 6945041.

It is an arithmetic number, because the mean of its divisors is an integer number (67307760).

Almost surely, 2^3909899880 is an apocalyptic number.

3909899880 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 3909899880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6461544960).

3909899880 is an abundant number, since it is smaller than the sum of its proper divisors (9013190040).

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

3909899880 is a wasteful number, since it uses less digits than its factorization.

3909899880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872 (or 865 counting only the distinct ones).

The product of its (nonzero) digits is 10077696, while the sum is 63.

The square root of 3909899880 is about 62529.1922225132. The cubic root of 3909899880 is about 1575.3916728095.

The spelling of 3909899880 in words is "three billion, nine hundred nine million, eight hundred ninety-nine thousand, eight hundred eighty".