220356730 has 48 divisors (see below), whose sum is σ = 438245640. Its totient is φ = 79713920.

The previous prime is 220356707. The next prime is 220356733. The reversal of 220356730 is 37653022.

220356730 = 198² + 199² + ... + 874².

It can be written as a sum of positive squares in 4 ways, for example, as 191185929 + 29170801 = 13827^2 + 5401^2 .

It is not an unprimeable number, because it can be changed into a prime (220356733) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 325152 + ... + 325828.

Almost surely, 2^220356730 is an apocalyptic number.

220356730 is a deficient number, since it is larger than the sum of its proper divisors (217888910).

220356730 is a wasteful number, since it uses less digits than its factorization.

220356730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975 (or 964 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 28.

The square root of 220356730 is about 14844.4174692037. The cubic root of 220356730 is about 604.0071870993.

The spelling of 220356730 in words is "two hundred twenty million, three hundred fifty-six thousand, seven hundred thirty".