398441870015 has 32 divisors (see below), whose sum is σ = 557713305600. Its totient is φ = 273155047200.

The previous prime is 398441870011. The next prime is 398441870027. The reversal of 398441870015 is 510078144893.

It is a happy number.

It is not a de Polignac number, because 398441870015 - 2² = 398441870011 is a prime.

It is a super-2 number, since 2×398441870015² (a number of 24 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398441870011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8261120 + ... + 8309210.

It is an arithmetic number, because the mean of its divisors is an integer number (17428540800).

Almost surely, 2^398441870015 is an apocalyptic number.

398441870015 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

398441870015 is a deficient number, since it is larger than the sum of its proper divisors (159271435585).

398441870015 is an equidigital number, since it uses as much as digits as its factorization.

398441870015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52948 (or 52934 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 398441870015 in words is "three hundred ninety-eight billion, four hundred forty-one million, eight hundred seventy thousand, fifteen".