1845399474 has 24 divisors (see below), whose sum is σ = 4073808492. Its totient is φ = 603526560.

The previous prime is 1845399469. The next prime is 1845399499. The reversal of 1845399474 is 4749935481.

1845399474 is a `hidden beast` number, since 1 + 84 + 5 + 3 + 99 + 474 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1797166449 + 48233025 = 42393^2 + 6945^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1845399474.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 966237 + ... + 968144.

Almost surely, 2^1845399474 is an apocalyptic number.

1845399474 is an abundant number, since it is smaller than the sum of its proper divisors (2228409018).

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

1845399474 is a wasteful number, since it uses less digits than its factorization.

1845399474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1934442 (or 1934439 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The square root of 1845399474 is about 42958.1130172171. The cubic root of 1845399474 is about 1226.5825940562.

The spelling of 1845399474 in words is "one billion, eight hundred forty-five million, three hundred ninety-nine thousand, four hundred seventy-four".