220387490 has 32 divisors (see below), whose sum is σ = 421956864. Its totient is φ = 82589440.

The previous prime is 220387487. The next prime is 220387529. The reversal of 220387490 is 94783022.

220387490 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 220387490.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35735 + ... + 41445.

It is an arithmetic number, because the mean of its divisors is an integer number (13186152).

Almost surely, 2^220387490 is an apocalyptic number.

220387490 is a deficient number, since it is larger than the sum of its proper divisors (201569374).

220387490 is a wasteful number, since it uses less digits than its factorization.

220387490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5962.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 220387490 is about 14845.4535127762. The cubic root of 220387490 is about 604.0352906152.

The spelling of 220387490 in words is "two hundred twenty million, three hundred eighty-seven thousand, four hundred ninety".