220705644 has 24 divisors (see below), whose sum is σ = 515734128. Its totient is φ = 73460800.

The previous prime is 220705643. The next prime is 220705649. The reversal of 220705644 is 446507022.

It is not an unprimeable number, because it can be changed into a prime (220705643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4707 + ... + 21530.

It is an arithmetic number, because the mean of its divisors is an integer number (21488922).

Almost surely, 2^220705644 is an apocalyptic number.

It is an amenable number.

220705644 is an abundant number, since it is smaller than the sum of its proper divisors (295028484).

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

220705644 is a wasteful number, since it uses less digits than its factorization.

220705644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26945 (or 26943 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 220705644 is about 14856.1651848652. The cubic root of 220705644 is about 604.3258150335.

The spelling of 220705644 in words is "two hundred twenty million, seven hundred five thousand, six hundred forty-four".