1840040312 has 32 divisors (see below), whose sum is σ = 3855524400. Its totient is φ = 815980800.

The previous prime is 1840040297. The next prime is 1840040317. The reversal of 1840040312 is 2130400481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1840040317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251387 + ... + 258602.

Almost surely, 2^1840040312 is an apocalyptic number.

It is an amenable number.

1840040312 is an abundant number, since it is smaller than the sum of its proper divisors (2015484088).

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

1840040312 is a wasteful number, since it uses less digits than its factorization.

1840040312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510047 (or 510043 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 1840040312 is about 42895.6910656537. The cubic root of 1840040312 is about 1225.3940838437.

Adding to 1840040312 its reverse (2130400481), we get a palindrome (3970440793).

The spelling of 1840040312 in words is "one billion, eight hundred forty million, forty thousand, three hundred twelve".