222420040 has 64 divisors (see below), whose sum is σ = 519966720. Its totient is φ = 85536000.

The previous prime is 222420031. The next prime is 222420043. The reversal of 222420040 is 40024222.

It is a junction number, because it is equal to n+sod(n) for n = 222419996 and 222420023.

It is not an unprimeable number, because it can be changed into a prime (222420043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 223945 + ... + 224935.

It is an arithmetic number, because the mean of its divisors is an integer number (8124480).

Almost surely, 2^222420040 is an apocalyptic number.

222420040 is a gapful number since it is divisible by the number (20) 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 222420040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259983360).

222420040 is an abundant number, since it is smaller than the sum of its proper divisors (297546680).

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

222420040 is a wasteful number, since it uses less digits than its factorization.

222420040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214 (or 1210 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 222420040 is about 14913.7533840412. The cubic root of 222420040 is about 605.8865403521.

Adding to 222420040 its reverse (40024222), we get a palindrome (262444262).

The spelling of 222420040 in words is "two hundred twenty-two million, four hundred twenty thousand, forty".