1820883740 has 36 divisors (see below), whose sum is σ = 4140632664. Its totient is φ = 672325056.

The previous prime is 1820883739. The next prime is 1820883751. The reversal of 1820883740 is 473880281.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 265982 + ... + 272741.

It is an arithmetic number, because the mean of its divisors is an integer number (115017574).

Almost surely, 2^1820883740 is an apocalyptic number.

1820883740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1820883740 is an abundant number, since it is smaller than the sum of its proper divisors (2319748924).

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

1820883740 is a wasteful number, since it uses less digits than its factorization.

1820883740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538758 (or 538743 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 41.

The square root of 1820883740 is about 42671.8143509272. The cubic root of 1820883740 is about 1221.1267338737.

The spelling of 1820883740 in words is "one billion, eight hundred twenty million, eight hundred eighty-three thousand, seven hundred forty".