1840812481 has 8 divisors (see below), whose sum is σ = 1887139584. Its totient is φ = 1794783840.

The previous prime is 1840812451. The next prime is 1840812487. The reversal of 1840812481 is 1842180481.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1840812481 - 2¹³ = 1840804289 is a prime.

It is a super-2 number, since 2×1840812481² = 6777181180410750722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1840812481.

It is not an unprimeable number, because it can be changed into a prime (1840812487) 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, 62100 + ... + 86821.

It is an arithmetic number, because the mean of its divisors is an integer number (235892448).

Almost surely, 2^1840812481 is an apocalyptic number.

It is an amenable number.

1840812481 is a deficient number, since it is larger than the sum of its proper divisors (46327103).

1840812481 is a wasteful number, since it uses less digits than its factorization.

1840812481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149231.

The product of its (nonzero) digits is 16384, while the sum is 37.

The square root of 1840812481 is about 42904.6906643085. The cubic root of 1840812481 is about 1225.5654712114.

The spelling of 1840812481 in words is "one billion, eight hundred forty million, eight hundred twelve thousand, four hundred eighty-one".