1818431382 has 16 divisors (see below), whose sum is σ = 3794987520. Its totient is φ = 579789672.

The previous prime is 1818431327. The next prime is 1818431441. The reversal of 1818431382 is 2831348181.

1818431382 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 1818431382.

It is a congruent number.

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, 6588382 + ... + 6588657.

It is an arithmetic number, because the mean of its divisors is an integer number (237186720).

Almost surely, 2^1818431382 is an apocalyptic number.

1818431382 is an abundant number, since it is smaller than the sum of its proper divisors (1976556138).

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

1818431382 is a wasteful number, since it uses less digits than its factorization.

1818431382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13177067.

The product of its digits is 36864, while the sum is 39.

The square root of 1818431382 is about 42643.0695658744. The cubic root of 1818431382 is about 1220.5782849264.

The spelling of 1818431382 in words is "one billion, eight hundred eighteen million, four hundred thirty-one thousand, three hundred eighty-two".