291247334040 has 128 divisors (see below), whose sum is σ = 996303188160. Its totient is φ = 67474489344.

The previous prime is 291247334039. The next prime is 291247334047. The reversal of 291247334040 is 40433742192.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 291247334040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (291247334047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5464569 + ... + 5517608.

Almost surely, 2^291247334040 is an apocalyptic number.

291247334040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

291247334040 is an abundant number, since it is smaller than the sum of its proper divisors (705055854120).

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

291247334040 is a wasteful number, since it uses less digits than its factorization.

291247334040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10982221 (or 10982217 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 39.

The spelling of 291247334040 in words is "two hundred ninety-one billion, two hundred forty-seven million, three hundred thirty-four thousand, forty".