220400220402 has 32 divisors (see below), whose sum is σ = 489793685760. Its totient is φ = 73464427440.

The previous prime is 220400220379. The next prime is 220400220409. The reversal of 220400220402 is 204022004022.

220400220402 is a `hidden beast` number, since 2 + 2 + 0 + 40 + 0 + 220 + 402 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (220400220409) 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, 3069127 + ... + 3140117.

It is an arithmetic number, because the mean of its divisors is an integer number (15306052680).

Almost surely, 2^220400220402 is an apocalyptic number.

220400220402 is an abundant number, since it is smaller than the sum of its proper divisors (269393465358).

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

220400220402 is a wasteful number, since it uses less digits than its factorization.

220400220402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128495 (or 128489 counting only the distinct ones).

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

Adding to 220400220402 its reverse (204022004022), we get a palindrome (424422224424).

The spelling of 220400220402 in words is "two hundred twenty billion, four hundred million, two hundred twenty thousand, four hundred two".