1830721874 has 16 divisors (see below), whose sum is σ = 2955286296. Its totient is φ = 847392000.

The previous prime is 1830721847. The next prime is 1830721883. The reversal of 1830721874 is 4781270381.

It can be written as a sum of positive squares in 4 ways, for example, as 1439671249 + 391050625 = 37943^2 + 19775^2 .

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 439277 + ... + 443424.

Almost surely, 2^1830721874 is an apocalyptic number.

1830721874 is a deficient number, since it is larger than the sum of its proper divisors (1124564422).

1830721874 is a wasteful number, since it uses less digits than its factorization.

1830721874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882781.

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 1830721874 is about 42786.9357865225. The cubic root of 1830721874 is about 1223.3220116573.

The spelling of 1830721874 in words is "one billion, eight hundred thirty million, seven hundred twenty-one thousand, eight hundred seventy-four".