220375728 has 60 divisors (see below), whose sum is σ = 639599688. Its totient is φ = 73457280.

The previous prime is 220375723. The next prime is 220375739. The reversal of 220375728 is 827573022.

It is a happy number.

It is a super-2 number, since 2×220375728² = 97130922983059968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 220375692 and 220375701.

It is not an unprimeable number, because it can be changed into a prime (220375723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24453 + ... + 32228.

Almost surely, 2^220375728 is an apocalyptic number.

It is an amenable number.

220375728 is an abundant number, since it is smaller than the sum of its proper divisors (419223960).

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

220375728 is an equidigital number, since it uses as much as digits as its factorization.

220375728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56704 (or 56686 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 220375728 is about 14845.0573592694. The cubic root of 220375728 is about 604.0245447096.

The spelling of 220375728 in words is "two hundred twenty million, three hundred seventy-five thousand, seven hundred twenty-eight".