3888991416 has 64 divisors (see below), whose sum is σ = 10186030080. Its totient is φ = 1235773440.

The previous prime is 3888991399. The next prime is 3888991427. The reversal of 3888991416 is 6141998883.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10840 + ... + 88856.

It is an arithmetic number, because the mean of its divisors is an integer number (159156720).

Almost surely, 2^3888991416 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 3888991416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5093015040).

3888991416 is an abundant number, since it is smaller than the sum of its proper divisors (6297038664).

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

3888991416 is a wasteful number, since it uses less digits than its factorization.

3888991416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78124 (or 78120 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 57.

The square root of 3888991416 is about 62361.7784865057. The cubic root of 3888991416 is about 1572.5784797422.

It can be divided in two parts, 38889 and 91416, that added together give a triangular number (130305 = T₅₁₀).

The spelling of 3888991416 in words is "three billion, eight hundred eighty-eight million, nine hundred ninety-one thousand, four hundred sixteen".