398728827893 has 8 divisors (see below), whose sum is σ = 442349393760. Its totient is φ = 356337010480.

The previous prime is 398728827851. The next prime is 398728827911.

398728827893 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-398728827893 is a prime.

It is a super-2 number, since 2×398728827893² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 398728827893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398728829893) 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, 307186430 + ... + 307187727.

It is an arithmetic number, because the mean of its divisors is an integer number (55293674220).

Almost surely, 2^398728827893 is an apocalyptic number.

It is an amenable number.

398728827893 is a deficient number, since it is larger than the sum of its proper divisors (43620565867).

398728827893 is a wasteful number, since it uses less digits than its factorization.

398728827893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614374227.

The product of its digits is 585252864, while the sum is 74.

The spelling of 398728827893 in words is "three hundred ninety-eight billion, seven hundred twenty-eight million, eight hundred twenty-seven thousand, eight hundred ninety-three".