398787787893 has 8 divisors (see below), whose sum is σ = 580054964256. Its totient is φ = 241689568400.

The previous prime is 398787787889. The next prime is 398787787903.

It is a happy number.

398787787893 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 398787787893 - 2² = 398787787889 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398787787813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6042239178 + ... + 6042239243.

It is an arithmetic number, because the mean of its divisors is an integer number (72506870532).

Almost surely, 2^398787787893 is an apocalyptic number.

398787787893 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

398787787893 is a deficient number, since it is larger than the sum of its proper divisors (181267176363).

398787787893 is a wasteful number, since it uses less digits than its factorization.

398787787893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12084478435.

The product of its digits is 7169347584, while the sum is 84.

The spelling of 398787787893 in words is "three hundred ninety-eight billion, seven hundred eighty-seven million, seven hundred eighty-seven thousand, eight hundred ninety-three".