3858764994 has 120 divisors (see below), whose sum is σ = 10159860348. Its totient is φ = 1091361600.

The previous prime is 3858764989. The next prime is 3858765007. The reversal of 3858764994 is 4994678583.

3858764994 is a `hidden beast` number, since 3 + 8 + 587 + 6 + 49 + 9 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3207749769 + 651015225 = 56637^2 + 25515^2 .

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 799332 + ... + 804144.

Almost surely, 2^3858764994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3858764994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5079930174).

3858764994 is an abundant number, since it is smaller than the sum of its proper divisors (6301095354).

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

3858764994 is a wasteful number, since it uses less digits than its factorization.

3858764994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4942 (or 4926 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 63.

The square root of 3858764994 is about 62118.9584104563. The cubic root of 3858764994 is about 1568.4936928625.

The spelling of 3858764994 in words is "three billion, eight hundred fifty-eight million, seven hundred sixty-four thousand, nine hundred ninety-four".