2147996394 has 40 divisors (see below), whose sum is σ = 4819935780. Its totient is φ = 714982464.

The previous prime is 2147996371. The next prime is 2147996407. The reversal of 2147996394 is 4936997412.

2147996394 is a `hidden beast` number, since 21 + 479 + 9 + 63 + 94 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1537659369 + 610337025 = 39213^2 + 24705^2 .

It is a super-2 number, since 2×2147996394² = 9227777017274006472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 2147996394.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 109702 + ... + 127790.

Almost surely, 2^2147996394 is an apocalyptic number.

2147996394 is an abundant number, since it is smaller than the sum of its proper divisors (2671939386).

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

2147996394 is a wasteful number, since it uses less digits than its factorization.

2147996394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18836 (or 18827 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 54.

The square root of 2147996394 is about 46346.4820024131. The cubic root of 2147996394 is about 1290.2618289519.

The spelling of 2147996394 in words is "two billion, one hundred forty-seven million, nine hundred ninety-six thousand, three hundred ninety-four".