222278732928 has 1152 divisors, whose sum is σ = 854814280320. Its totient is φ = 57020350464.

The previous prime is 222278732927. The next prime is 222278732933. The reversal of 222278732928 is 829237872222.

222278732928 is a `hidden beast` number, since 2 + 22 + 278 + 7 + 329 + 28 = 666.

It is a tau number, because it is divible by the number of its divisors (1152).

It is a super-2 number, since 2×222278732928² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (222278732927) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 595921350 + ... + 595921722.

It is an arithmetic number, because the mean of its divisors is an integer number (742026285).

Almost surely, 2^222278732928 is an apocalyptic number.

222278732928 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222278732928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (427407140160).

222278732928 is an abundant number, since it is smaller than the sum of its proper divisors (632535547392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

222278732928 is a wasteful number, since it uses less digits than its factorization.

222278732928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456 (or 425 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 54.

The spelling of 222278732928 in words is "two hundred twenty-two billion, two hundred seventy-eight million, seven hundred thirty-two thousand, nine hundred twenty-eight".