1840805394 has 16 divisors (see below), whose sum is σ = 3684616320. Its totient is φ = 613100880.

The previous prime is 1840805387. The next prime is 1840805401. The reversal of 1840805394 is 4935080481.

It is an interprime number because it is at equal distance from previous prime (1840805387) and next prime (1840805401).

It is a Curzon 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, 117229 + ... + 132000.

It is an arithmetic number, because the mean of its divisors is an integer number (230288520).

Almost surely, 2^1840805394 is an apocalyptic number.

1840805394 is an abundant number, since it is smaller than the sum of its proper divisors (1843810926).

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

1840805394 is a wasteful number, since it uses less digits than its factorization.

1840805394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250465.

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 1840805394 is about 42904.6080741918. The cubic root of 1840805394 is about 1225.5638984287.

The spelling of 1840805394 in words is "one billion, eight hundred forty million, eight hundred five thousand, three hundred ninety-four".