1851740872 has 8 divisors (see below), whose sum is σ = 3472014150. Its totient is φ = 925870432.

The previous prime is 1851740867. The next prime is 1851740881. The reversal of 1851740872 is 2780471581.

It can be written as a sum of positive squares in only one way, i.e., 996412356 + 855328516 = 31566^2 + 29246^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115733797 + ... + 115733812.

Almost surely, 2^1851740872 is an apocalyptic number.

It is an amenable number.

1851740872 is a deficient number, since it is larger than the sum of its proper divisors (1620273278).

1851740872 is a wasteful number, since it uses less digits than its factorization.

1851740872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231467615 (or 231467611 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 43.

The square root of 1851740872 is about 43031.8588025198. The cubic root of 1851740872 is about 1227.9859678605.

The spelling of 1851740872 in words is "one billion, eight hundred fifty-one million, seven hundred forty thousand, eight hundred seventy-two".