1862138980 has 24 divisors (see below), whose sum is σ = 4211299512. Its totient is φ = 687558912.

The previous prime is 1862138959. The next prime is 1862138983. The reversal of 1862138980 is 898312681.

It can be written as a sum of positive squares in 4 ways, for example, as 51466276 + 1810672704 = 7174^2 + 42552^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1862138980.

It is not an unprimeable number, because it can be changed into a prime (1862138983) 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, 3580777 + ... + 3581296.

It is an arithmetic number, because the mean of its divisors is an integer number (175470813).

Almost surely, 2^1862138980 is an apocalyptic number.

1862138980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1862138980 is an abundant number, since it is smaller than the sum of its proper divisors (2349160532).

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

1862138980 is a wasteful number, since it uses less digits than its factorization.

1862138980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7162095 (or 7162093 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 46.

The square root of 1862138980 is about 43152.5083859560. The cubic root of 1862138980 is about 1230.2801882241.

The spelling of 1862138980 in words is "one billion, eight hundred sixty-two million, one hundred thirty-eight thousand, nine hundred eighty".