220387872 has 48 divisors (see below), whose sum is σ = 579543552. Its totient is φ = 73332480.

The previous prime is 220387831. The next prime is 220387889. The reversal of 220387872 is 278783022.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 220387872.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63297 + ... + 66687.

It is an arithmetic number, because the mean of its divisors is an integer number (12073824).

Almost surely, 2^220387872 is an apocalyptic number.

It is an amenable number.

220387872 is an abundant number, since it is smaller than the sum of its proper divisors (359155680).

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

220387872 is a wasteful number, since it uses less digits than its factorization.

220387872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4081 (or 4073 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 39.

The square root of 220387872 is about 14845.4663786625. The cubic root of 220387872 is about 604.0356396086.

It can be divided in two parts, 2203878 and 72, that added together give a triangular number (2203950 = T₂₀₉₉).

The spelling of 220387872 in words is "two hundred twenty million, three hundred eighty-seven thousand, eight hundred seventy-two".