222400040420 has 48 divisors (see below), whose sum is σ = 468371257200. Its totient is φ = 88706641920.

The previous prime is 222400040407. The next prime is 222400040431. The reversal of 222400040420 is 24040004222.

It can be written as a sum of positive squares in 8 ways, for example, as 53924270656 + 168475769764 = 232216^2 + 410458^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 222400040392 and 222400040401.

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, 30761366 + ... + 30768594.

It is an arithmetic number, because the mean of its divisors is an integer number (9757734525).

Almost surely, 2^222400040420 is an apocalyptic number.

222400040420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222400040420 is an abundant number, since it is smaller than the sum of its proper divisors (245971216780).

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

222400040420 is a wasteful number, since it uses less digits than its factorization.

222400040420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11408 (or 11406 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 222400040420 its reverse (24040004222), we get a palindrome (246440044642).

The spelling of 222400040420 in words is "two hundred twenty-two billion, four hundred million, forty thousand, four hundred twenty".