220746520 has 32 divisors (see below), whose sum is σ = 508234320. Its totient is φ = 86244480.

The previous prime is 220746481. The next prime is 220746527. The reversal of 220746520 is 25647022.

It is a super-2 number, since 2×220746520² = 97458052184220800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220746527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62451 + ... + 65890.

Almost surely, 2^220746520 is an apocalyptic number.

220746520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220746520 is an abundant number, since it is smaller than the sum of its proper divisors (287487800).

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

220746520 is a wasteful number, since it uses less digits than its factorization.

220746520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128395 (or 128391 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 220746520 is about 14857.5408463177. The cubic root of 220746520 is about 604.3631209774.

The spelling of 220746520 in words is "two hundred twenty million, seven hundred forty-six thousand, five hundred twenty".