11992390426 has 16 divisors (see below), whose sum is σ = 18078664680. Its totient is φ = 5966231040.

The previous prime is 11992390409. The next prime is 11992390429. The reversal of 11992390426 is 62409329911.

It can be written as a sum of positive squares in 4 ways, for example, as 5243932225 + 6748458201 = 72415^2 + 82149^2 .

It is a super-2 number, since 2×11992390426² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11992390429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 383410 + ... + 413506.

Almost surely, 2^11992390426 is an apocalyptic number.

11992390426 is a deficient number, since it is larger than the sum of its proper divisors (6086274254).

11992390426 is a wasteful number, since it uses less digits than its factorization.

11992390426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31089.

The product of its (nonzero) digits is 209952, while the sum is 46.

The spelling of 11992390426 in words is "eleven billion, nine hundred ninety-two million, three hundred ninety thousand, four hundred twenty-six".