3913894512 has 320 divisors, whose sum is σ = 13113446400. Its totient is φ = 1105125120.

The previous prime is 3913894511. The next prime is 3913894519. The reversal of 3913894512 is 2154983193.

It is a happy number.

3913894512 is a `hidden beast` number, since 39 + 13 + 8 + 94 + 512 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3913894511) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6048973 + ... + 6049619.

It is an arithmetic number, because the mean of its divisors is an integer number (40979520).

Almost surely, 2^3913894512 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 3913894512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6556723200).

3913894512 is an abundant number, since it is smaller than the sum of its proper divisors (9199551888).

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

3913894512 is a wasteful number, since it uses less digits than its factorization.

3913894512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761 (or 749 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 3913894512 is about 62561.1262046968. The cubic root of 3913894512 is about 1575.9280009538.

The spelling of 3913894512 in words is "three billion, nine hundred thirteen million, eight hundred ninety-four thousand, five hundred twelve".