1899385550 has 12 divisors (see below), whose sum is σ = 3532857216. Its totient is φ = 759754200.

The previous prime is 1899385541. The next prime is 1899385561. The reversal of 1899385550 is 555839981.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1899385492 and 1899385501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18993806 + ... + 18993905.

It is an arithmetic number, because the mean of its divisors is an integer number (294404768).

Almost surely, 2^1899385550 is an apocalyptic number.

1899385550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1899385550 is a deficient number, since it is larger than the sum of its proper divisors (1633471666).

1899385550 is a wasteful number, since it uses less digits than its factorization.

1899385550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37987723 (or 37987718 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 53.

The square root of 1899385550 is about 43581.9406405910. The cubic root of 1899385550 is about 1238.4288003887.

The spelling of 1899385550 in words is "one billion, eight hundred ninety-nine million, three hundred eighty-five thousand, five hundred fifty".