5209994394 has 96 divisors (see below), whose sum is σ = 12671987328. Its totient is φ = 1533312000.

The previous prime is 5209994347. The next prime is 5209994401. The reversal of 5209994394 is 4934999025.

It is a super-2 number, since 2×5209994394² = 54288083171022854472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 5209994394.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1955107 + ... + 1957769.

It is an arithmetic number, because the mean of its divisors is an integer number (131999868).

Almost surely, 2^5209994394 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5209994394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6335993664).

5209994394 is an abundant number, since it is smaller than the sum of its proper divisors (7461992934).

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

5209994394 is a wasteful number, since it uses less digits than its factorization.

5209994394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2964 (or 2961 counting only the distinct ones).

The product of its (nonzero) digits is 3149280, while the sum is 54.

The square root of 5209994394 is about 72180.2908971694. The cubic root of 5209994394 is about 1733.5874407127.

The spelling of 5209994394 in words is "five billion, two hundred nine million, nine hundred ninety-four thousand, three hundred ninety-four".