220628724 has 12 divisors (see below), whose sum is σ = 514800384. Its totient is φ = 73542904.

The previous prime is 220628701. The next prime is 220628761. The reversal of 220628724 is 427826022.

220628724 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9192852 + ... + 9192875.

It is an arithmetic number, because the mean of its divisors is an integer number (42900032).

Almost surely, 2^220628724 is an apocalyptic number.

It is an amenable number.

220628724 is an abundant number, since it is smaller than the sum of its proper divisors (294171660).

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

220628724 is a wasteful number, since it uses less digits than its factorization.

220628724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18385734 (or 18385732 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 220628724 is about 14853.5761350592. The cubic root of 220628724 is about 604.2556006336.

The spelling of 220628724 in words is "two hundred twenty million, six hundred twenty-eight thousand, seven hundred twenty-four".