1870021842 has 48 divisors (see below), whose sum is σ = 4064901408. Its totient is φ = 573256320.

The previous prime is 1870021841. The next prime is 1870021861. The reversal of 1870021842 is 2481200781.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1870021841) by changing a digit.

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 in 23 ways as a sum of consecutive naturals, for example, 281653 + ... + 288215.

It is an arithmetic number, because the mean of its divisors is an integer number (84685446).

Almost surely, 2^1870021842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1870021842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2032450704).

1870021842 is an abundant number, since it is smaller than the sum of its proper divisors (2194879566).

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

1870021842 is a wasteful number, since it uses less digits than its factorization.

1870021842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6875 (or 6862 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 33.

The square root of 1870021842 is about 43243.7491667871. The cubic root of 1870021842 is about 1232.0137638487.

The spelling of 1870021842 in words is "one billion, eight hundred seventy million, twenty-one thousand, eight hundred forty-two".