2691942388 has 24 divisors (see below), whose sum is σ = 4763505600. Its totient is φ = 1331017728.

The previous prime is 2691942377. The next prime is 2691942391. The reversal of 2691942388 is 8832491962.

It is a super-2 number, since 2×2691942388² = 14493107640622285088, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133473 + ... + 152311.

It is an arithmetic number, because the mean of its divisors is an integer number (198479400).

Almost surely, 2^2691942388 is an apocalyptic number.

It is an amenable number.

2691942388 is a deficient number, since it is larger than the sum of its proper divisors (2071563212).

2691942388 is a wasteful number, since it uses less digits than its factorization.

2691942388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19239 (or 19237 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 52.

The square root of 2691942388 is about 51883.9318864714. The cubic root of 2691942388 is about 1391.0900801544.

The spelling of 2691942388 in words is "two billion, six hundred ninety-one million, nine hundred forty-two thousand, three hundred eighty-eight".