398929287491 has 8 divisors (see below), whose sum is σ = 479914932480. Its totient is φ = 323942579208.

The previous prime is 398929287451. The next prime is 398929287503. The reversal of 398929287491 is 194782929893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-398929287491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398929287401) 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, 1499734031 + ... + 1499734296.

It is an arithmetic number, because the mean of its divisors is an integer number (59989366560).

Almost surely, 2^398929287491 is an apocalyptic number.

398929287491 is a deficient number, since it is larger than the sum of its proper divisors (80985644989).

398929287491 is a wasteful number, since it uses less digits than its factorization.

398929287491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2999468353.

The product of its digits is 141087744, while the sum is 71.

The spelling of 398929287491 in words is "three hundred ninety-eight billion, nine hundred twenty-nine million, two hundred eighty-seven thousand, four hundred ninety-one".