1860945820 has 12 divisors (see below), whose sum is σ = 3907986264. Its totient is φ = 744378320.

The previous prime is 1860945803. The next prime is 1860945901. The reversal of 1860945820 is 285490681.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46523626 + ... + 46523665.

It is an arithmetic number, because the mean of its divisors is an integer number (325665522).

Almost surely, 2^1860945820 is an apocalyptic number.

1860945820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1860945820 is an abundant number, since it is smaller than the sum of its proper divisors (2047040444).

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

1860945820 is a wasteful number, since it uses less digits than its factorization.

1860945820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93047300 (or 93047298 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 1860945820 is about 43138.6812501263. The cubic root of 1860945820 is about 1230.0173659610.

The spelling of 1860945820 in words is "one billion, eight hundred sixty million, nine hundred forty-five thousand, eight hundred twenty".