3994177536 has 156 divisors (see below), whose sum is σ = 11666703412. Its totient is φ = 1316487168.

The previous prime is 3994177487. The next prime is 3994177601. The reversal of 3994177536 is 6357714993.

It is a happy number.

3994177536 is a `hidden beast` number, since 3 + 9 + 94 + 17 + 7 + 536 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 829440000 + 3164737536 = 28800^2 + 56256^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3575250 + ... + 3576366.

Almost surely, 2^3994177536 is an apocalyptic number.

3994177536 is a gapful number since it is divisible by the number (36) 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 3994177536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5833351706).

3994177536 is an abundant number, since it is smaller than the sum of its proper divisors (7672525876).

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

3994177536 is a wasteful number, since it uses less digits than its factorization.

3994177536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1244 (or 1219 counting only the distinct ones).

The product of its digits is 4286520, while the sum is 54.

The square root of 3994177536 is about 63199.5058208527. The cubic root of 3994177536 is about 1586.6304624965.

The spelling of 3994177536 in words is "three billion, nine hundred ninety-four million, one hundred seventy-seven thousand, five hundred thirty-six".