398950764859 has 4 divisors (see below), whose sum is σ = 399163995360. Its totient is φ = 398737534360.

The previous prime is 398950764829. The next prime is 398950764907. The reversal of 398950764859 is 958467059893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 958467059893 = 7 ⋅136923865699.

It is a cyclic number.

It is not a de Polignac number, because 398950764859 - 2⁵ = 398950764827 is a prime.

It is a super-2 number, since 2×398950764859² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 398950764791 and 398950764800.

It is not an unprimeable number, because it can be changed into a prime (398950764829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106612444 + ... + 106616185.

It is an arithmetic number, because the mean of its divisors is an integer number (99790998840).

Almost surely, 2^398950764859 is an apocalyptic number.

398950764859 is a deficient number, since it is larger than the sum of its proper divisors (213230501).

398950764859 is a wasteful number, since it uses less digits than its factorization.

398950764859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213230500.

The product of its (nonzero) digits is 587865600, while the sum is 73.

The spelling of 398950764859 in words is "three hundred ninety-eight billion, nine hundred fifty million, seven hundred sixty-four thousand, eight hundred fifty-nine".