1850138447 has 4 divisors (see below), whose sum is σ = 1851213960. Its totient is φ = 1849062936.

The previous prime is 1850138429. The next prime is 1850138449. The reversal of 1850138447 is 7448310581.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1850138447 - 2¹⁶ = 1850072911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1850138449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 535172 + ... + 538617.

It is an arithmetic number, because the mean of its divisors is an integer number (462803490).

Almost surely, 2^1850138447 is an apocalyptic number.

1850138447 is a deficient number, since it is larger than the sum of its proper divisors (1075513).

1850138447 is a wasteful number, since it uses less digits than its factorization.

1850138447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075512.

The product of its (nonzero) digits is 107520, while the sum is 41.

The square root of 1850138447 is about 43013.2357187878. The cubic root of 1850138447 is about 1227.6316484336.

The spelling of 1850138447 in words is "one billion, eight hundred fifty million, one hundred thirty-eight thousand, four hundred forty-seven".