4000220642 has 16 divisors (see below), whose sum is σ = 6547014432. Its totient is φ = 1817949120.

The previous prime is 4000220621. The next prime is 4000220671. The reversal of 4000220642 is 2460220004.

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, 138218 + ... + 164634.

It is an arithmetic number, because the mean of its divisors is an integer number (409188402).

Almost surely, 2^4000220642 is an apocalyptic number.

4000220642 is a deficient number, since it is larger than the sum of its proper divisors (2546793790).

4000220642 is a wasteful number, since it uses less digits than its factorization.

4000220642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33313.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 4000220642 is about 63247.2975074825. The cubic root of 4000220642 is about 1587.4302387101.

Adding to 4000220642 its reverse (2460220004), we get a palindrome (6460440646).

The spelling of 4000220642 in words is "four billion, two hundred twenty thousand, six hundred forty-two".