1840680730 has 64 divisors (see below), whose sum is σ = 3861043200. Its totient is φ = 618799104.

The previous prime is 1840680719. The next prime is 1840680733. The reversal of 1840680730 is 370860481.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1840680730.

It is not an unprimeable number, because it can be changed into a prime (1840680733) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 766071 + ... + 768469.

It is an arithmetic number, because the mean of its divisors is an integer number (60328800).

Almost surely, 2^1840680730 is an apocalyptic number.

1840680730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1840680730 is an abundant number, since it is smaller than the sum of its proper divisors (2020362470).

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

1840680730 is a wasteful number, since it uses less digits than its factorization.

1840680730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2623.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 1840680730 is about 42903.1552452730. The cubic root of 1840680730 is about 1225.5362317079.

The spelling of 1840680730 in words is "one billion, eight hundred forty million, six hundred eighty thousand, seven hundred thirty".