1820040384 has 28 divisors (see below), whose sum is σ = 4815524024. Its totient is φ = 606680064.

The previous prime is 1820040371. The next prime is 1820040401. The reversal of 1820040384 is 4830400281.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4739497 + ... + 4739880.

Almost surely, 2^1820040384 is an apocalyptic number.

It is an amenable number.

1820040384 is an abundant number, since it is smaller than the sum of its proper divisors (2995483640).

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

1820040384 is an equidigital number, since it uses as much as digits as its factorization.

1820040384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9479392 (or 9479382 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 1820040384 is about 42661.9313205579. The cubic root of 1820040384 is about 1220.9381800834.

The spelling of 1820040384 in words is "one billion, eight hundred twenty million, forty thousand, three hundred eighty-four".