220040442 has 16 divisors (see below), whose sum is σ = 488978880. Its totient is φ = 73346796.

The previous prime is 220040437. The next prime is 220040453. The reversal of 220040442 is 244040022.

220040442 is a `hidden beast` number, since 220 + 0 + 4 + 0 + 442 = 666.

It is a super-2 number, since 2×220040442² = 96835592231110728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2037358 + ... + 2037465.

It is an arithmetic number, because the mean of its divisors is an integer number (30561180).

Almost surely, 2^220040442 is an apocalyptic number.

220040442 is an abundant number, since it is smaller than the sum of its proper divisors (268938438).

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

220040442 is a wasteful number, since it uses less digits than its factorization.

220040442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4074834 (or 4074828 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 220040442 is about 14833.7602110861. The cubic root of 220040442 is about 603.7180624285.

Adding to 220040442 its reverse (244040022), we get a palindrome (464080464).

The spelling of 220040442 in words is "two hundred twenty million, forty thousand, four hundred forty-two".