398636636893 has 8 divisors (see below), whose sum is σ = 453783998016. Its totient is φ = 346640553600.

The previous prime is 398636636833. The next prime is 398636637011.

398636636893 is nontrivially palindromic in base 10.

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-398636636893 is a prime.

It is a super-2 number, since 2×398636636893² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398636636833) 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, 787819188 + ... + 787819693.

It is an arithmetic number, because the mean of its divisors is an integer number (56722999752).

Almost surely, 2^398636636893 is an apocalyptic number.

It is an amenable number.

398636636893 is a deficient number, since it is larger than the sum of its proper divisors (55147361123).

398636636893 is a wasteful number, since it uses less digits than its factorization.

398636636893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1575638915.

The product of its digits is 544195584, while the sum is 70.

The spelling of 398636636893 in words is "three hundred ninety-eight billion, six hundred thirty-six million, six hundred thirty-six thousand, eight hundred ninety-three".