1868740447 has 6 divisors (see below), whose sum is σ = 2135834088. Its totient is φ = 1601679492.

The previous prime is 1868740439. The next prime is 1868740457. The reversal of 1868740447 is 7440478681.

It is not a de Polignac number, because 1868740447 - 2³ = 1868740439 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1868740447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1868740427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 106204 + ... + 122542.

It is an arithmetic number, because the mean of its divisors is an integer number (355972348).

Almost surely, 2^1868740447 is an apocalyptic number.

1868740447 is a deficient number, since it is larger than the sum of its proper divisors (267093641).

1868740447 is an frugal number, since it uses more digits than its factorization.

1868740447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32685 (or 16346 counting only the distinct ones).

The product of its (nonzero) digits is 1204224, while the sum is 49.

The square root of 1868740447 is about 43228.9306714843. The cubic root of 1868740447 is about 1231.7322952996.

The spelling of 1868740447 in words is "one billion, eight hundred sixty-eight million, seven hundred forty thousand, four hundred forty-seven".