1850139648 has 396 divisors, whose sum is σ = 6607298412. Its totient is φ = 495452160.

The previous prime is 1850139647. The next prime is 1850139671. The reversal of 1850139648 is 8469310581.

1850139648 is a `hidden beast` number, since 18 + 501 + 3 + 96 + 48 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1416167424 + 433972224 = 37632^2 + 20832^2 .

It is not an unprimeable number, because it can be changed into a prime (1850139647) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7676808 + ... + 7677048.

It is an arithmetic number, because the mean of its divisors is an integer number (16685097).

Almost surely, 2^1850139648 is an apocalyptic number.

1850139648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1850139648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3303649206).

1850139648 is an abundant number, since it is smaller than the sum of its proper divisors (4757158764).

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

1850139648 is a wasteful number, since it uses less digits than its factorization.

1850139648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298 (or 270 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 1850139648 is about 43013.2496796045. The cubic root of 1850139648 is about 1227.6319140687.

The spelling of 1850139648 in words is "one billion, eight hundred fifty million, one hundred thirty-nine thousand, six hundred forty-eight".