1868819928 has 32 divisors (see below), whose sum is σ = 4946877360. Its totient is φ = 586296320.

The previous prime is 1868819921. The next prime is 1868819951. The reversal of 1868819928 is 8299188681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1868819921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2289813 + ... + 2290628.

Almost surely, 2^1868819928 is an apocalyptic number.

It is an amenable number.

1868819928 is an abundant number, since it is smaller than the sum of its proper divisors (3078057432).

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

1868819928 is a wasteful number, since it uses less digits than its factorization.

1868819928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4580467 (or 4580463 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 60.

The square root of 1868819928 is about 43229.8499650415. The cubic root of 1868819928 is about 1231.7497576723.

The spelling of 1868819928 in words is "one billion, eight hundred sixty-eight million, eight hundred nineteen thousand, nine hundred twenty-eight".