220517428 has 12 divisors (see below), whose sum is σ = 386148672. Its totient is φ = 110189240.

The previous prime is 220517417. The next prime is 220517431. The reversal of 220517428 is 824715022.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 220517428.

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, 9868 + ... + 23203.

It is an arithmetic number, because the mean of its divisors is an integer number (32179056).

Almost surely, 2^220517428 is an apocalyptic number.

It is an amenable number.

220517428 is a deficient number, since it is larger than the sum of its proper divisors (165631244).

220517428 is a wasteful number, since it uses less digits than its factorization.

220517428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34742 (or 34740 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 220517428 is about 14849.8292246073. The cubic root of 220517428 is about 604.1539781106.

The spelling of 220517428 in words is "two hundred twenty million, five hundred seventeen thousand, four hundred twenty-eight".