3994425943236 has 27 divisors (see below), whose sum is σ = 10097051446573. Its totient is φ = 1331471317200.

The previous prime is 3994425943231. The next prime is 3994425943237. The reversal of 3994425943236 is 6323495244993.

The square root of 3994425943236 is 1998606.

It is a perfect power (a square), and thus also a powerful number.

3994425943236 is a `hidden beast` number, since 3 + 9 + 9 + 4 + 4 + 2 + 594 + 3 + 2 + 36 = 666.

It can be written as a sum of positive squares in only one way, i.e., 978924232836 + 3015501710400 = 989406^2 + 1736520^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3994425943231) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 11825086 + ... + 12158186.

Almost surely, 2^{3994425943236} is an apocalyptic number.

3994425943236 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

3994425943236 is the 1998606-th square number.

It is an amenable number.

3994425943236 is an abundant number, since it is smaller than the sum of its proper divisors (6102625503337).

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

3994425943236 is an frugal number, since it uses more digits than its factorization.

3994425943236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666212 (or 333106 counting only the distinct ones).

The product of its digits is 151165440, while the sum is 63.

The spelling of 3994425943236 in words is "three trillion, nine hundred ninety-four billion, four hundred twenty-five million, nine hundred forty-three thousand, two hundred thirty-six".