398878156222 has 32 divisors (see below), whose sum is σ = 739880515584. Its totient is φ = 157050079200.

The previous prime is 398878156181. The next prime is 398878156273. The reversal of 398878156222 is 222651878893.

It is a super-2 number, since 2×398878156222² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5155054 + ... + 5231857.

It is an arithmetic number, because the mean of its divisors is an integer number (23121266112).

Almost surely, 2^398878156222 is an apocalyptic number.

398878156222 is a deficient number, since it is larger than the sum of its proper divisors (341002359362).

398878156222 is a wasteful number, since it uses less digits than its factorization.

398878156222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10387144.

The product of its digits is 23224320, while the sum is 61.

The spelling of 398878156222 in words is "three hundred ninety-eight billion, eight hundred seventy-eight million, one hundred fifty-six thousand, two hundred twenty-two".