220823664 has 40 divisors (see below), whose sum is σ = 588867072. Its totient is φ = 71232960.

The previous prime is 220823641. The next prime is 220823677. The reversal of 220823664 is 466328022.

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, 72714 + ... + 75689.

Almost surely, 2^220823664 is an apocalyptic number.

220823664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

220823664 is an abundant number, since it is smaller than the sum of its proper divisors (368043408).

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

220823664 is a wasteful number, since it uses less digits than its factorization.

220823664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148445 (or 148439 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 220823664 is about 14860.1367423049. The cubic root of 220823664 is about 604.4335147766.

The spelling of 220823664 in words is "two hundred twenty million, eight hundred twenty-three thousand, six hundred sixty-four".