2391291398 has 16 divisors (see below), whose sum is σ = 3777444720. Its totient is φ = 1132200576.

The previous prime is 2391291391. The next prime is 2391291403. The reversal of 2391291398 is 8931921932.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2391291391) 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, 77786 + ... + 104082.

It is an arithmetic number, because the mean of its divisors is an integer number (236090295).

Almost surely, 2^2391291398 is an apocalyptic number.

2391291398 is a deficient number, since it is larger than the sum of its proper divisors (1386153322).

2391291398 is a wasteful number, since it uses less digits than its factorization.

2391291398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28711.

The product of its digits is 209952, while the sum is 47.

The square root of 2391291398 is about 48900.8322833058. The cubic root of 2391291398 is about 1337.2445416326.

The spelling of 2391291398 in words is "two billion, three hundred ninety-one million, two hundred ninety-one thousand, three hundred ninety-eight".