220788534 has 16 divisors (see below), whose sum is σ = 445865472. Its totient is φ = 72881448.

The previous prime is 220788521. The next prime is 220788559. The reversal of 220788534 is 435887022.

It is a junction number, because it is equal to n+sod(n) for n = 220788492 and 220788501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178014 + ... + 179249.

It is an arithmetic number, because the mean of its divisors is an integer number (27866592).

Almost surely, 2^220788534 is an apocalyptic number.

220788534 is an abundant number, since it is smaller than the sum of its proper divisors (225076938).

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

220788534 is a wasteful number, since it uses less digits than its factorization.

220788534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357371.

The product of its (nonzero) digits is 107520, while the sum is 39.

The square root of 220788534 is about 14858.9546738659. The cubic root of 220788534 is about 604.4014607308.

The spelling of 220788534 in words is "two hundred twenty million, seven hundred eighty-eight thousand, five hundred thirty-four".