1799673820 has 72 divisors (see below), whose sum is σ = 4358956896. Its totient is φ = 611404416.

The previous prime is 1799673809. The next prime is 1799673823. The reversal of 1799673820 is 283769971.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1799673823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2257662 + ... + 2258458.

It is an arithmetic number, because the mean of its divisors is an integer number (60541068).

Almost surely, 2^1799673820 is an apocalyptic number.

1799673820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1799673820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2179478448).

1799673820 is an abundant number, since it is smaller than the sum of its proper divisors (2559283076).

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

1799673820 is a wasteful number, since it uses less digits than its factorization.

1799673820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1067 (or 938 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 52.

The square root of 1799673820 is about 42422.5626288653. The cubic root of 1799673820 is about 1216.3669171705.

The spelling of 1799673820 in words is "one billion, seven hundred ninety-nine million, six hundred seventy-three thousand, eight hundred twenty".