291431428368 has 40 divisors (see below), whose sum is σ = 754579531200. Its totient is φ = 96922518144.

The previous prime is 291431428333. The next prime is 291431428369. The reversal of 291431428368 is 863824134192.

It is a super-2 number, since 2×291431428368² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 291431428368.

It is not an unprimeable number, because it can be changed into a prime (291431428369) by changing a digit.

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, 6894063 + ... + 6936206.

It is an arithmetic number, because the mean of its divisors is an integer number (18864488280).

Almost surely, 2^291431428368 is an apocalyptic number.

It is an amenable number.

291431428368 is an abundant number, since it is smaller than the sum of its proper divisors (463148102832).

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

291431428368 is a wasteful number, since it uses less digits than its factorization.

291431428368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13830719 (or 13830713 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 51.

The spelling of 291431428368 in words is "two hundred ninety-one billion, four hundred thirty-one million, four hundred twenty-eight thousand, three hundred sixty-eight".