228121642 has 16 divisors (see below), whose sum is σ = 396424512. Its totient is φ = 96426720.

The previous prime is 228121637. The next prime is 228121693. The reversal of 228121642 is 246121822.

228121642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 228121642.

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, 110584 + ... + 112627.

It is an arithmetic number, because the mean of its divisors is an integer number (24776532).

Almost surely, 2^228121642 is an apocalyptic number.

228121642 is a deficient number, since it is larger than the sum of its proper divisors (168302870).

228121642 is a wasteful number, since it uses less digits than its factorization.

228121642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223293.

The product of its digits is 3072, while the sum is 28.

The square root of 228121642 is about 15103.6963025612. The cubic root of 228121642 is about 611.0200991100.

The spelling of 228121642 in words is "two hundred twenty-eight million, one hundred twenty-one thousand, six hundred forty-two".