220440402 has 96 divisors (see below), whose sum is σ = 598066560. Its totient is φ = 57127680.

The previous prime is 220440391. The next prime is 220440419. The reversal of 220440402 is 204044022.

220440402 is a `hidden beast` number, since 220 + 4 + 40 + 402 = 666.

220440402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 47 ways as a sum of consecutive naturals, for example, 95502 + ... + 97782.

It is an arithmetic number, because the mean of its divisors is an integer number (6229860).

Almost surely, 2^220440402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220440402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299033280).

220440402 is an abundant number, since it is smaller than the sum of its proper divisors (377626158).

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

220440402 is a wasteful number, since it uses less digits than its factorization.

220440402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2368 (or 2365 counting only the distinct ones).

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

The square root of 220440402 is about 14847.2355002539. The cubic root of 220440402 is about 604.0836269309.

Adding to 220440402 its reverse (204044022), we get a palindrome (424484424).

The spelling of 220440402 in words is "two hundred twenty million, four hundred forty thousand, four hundred two".