1810490980 has 24 divisors (see below), whose sum is σ = 3864362040. Its totient is φ = 712323840.

The previous prime is 1810490947. The next prime is 1810490987. The reversal of 1810490980 is 890940181.

It can be written as a sum of positive squares in 4 ways, for example, as 71267364 + 1739223616 = 8442^2 + 41704^2 .

It is a super-2 number, since 2×1810490980² = 6555755177322720800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1810490987) 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, 740785 + ... + 743224.

It is an arithmetic number, because the mean of its divisors is an integer number (161015085).

Almost surely, 2^1810490980 is an apocalyptic number.

1810490980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1810490980 is an abundant number, since it is smaller than the sum of its proper divisors (2053871060).

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

1810490980 is a wasteful number, since it uses less digits than its factorization.

1810490980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1484079 (or 1484077 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 1810490980 is about 42549.8646296319. The cubic root of 1810490980 is about 1218.7990914962.

The spelling of 1810490980 in words is "one billion, eight hundred ten million, four hundred ninety thousand, nine hundred eighty".