220726464 has 56 divisors (see below), whose sum is σ = 667438848. Its totient is φ = 63064320.

The previous prime is 220726463. The next prime is 220726481. The reversal of 220726464 is 464627022.

It is a tau number, because it is divible by the number of its divisors (56).

It is not an unprimeable number, because it can be changed into a prime (220726463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80772 + ... + 83459.

Almost surely, 2^220726464 is an apocalyptic number.

220726464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

220726464 is an abundant number, since it is smaller than the sum of its proper divisors (446712384).

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

220726464 is a wasteful number, since it uses less digits than its factorization.

220726464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164253 (or 164243 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 33.

The square root of 220726464 is about 14856.8658875282. The cubic root of 220726464 is about 604.3448172176.

The spelling of 220726464 in words is "two hundred twenty million, seven hundred twenty-six thousand, four hundred sixty-four".