1898722782 has 256 divisors, whose sum is σ = 5138841600. Its totient is φ = 519631200.

The previous prime is 1898722759. The next prime is 1898722789. The reversal of 1898722782 is 2872278981.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1898722789) 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 127 ways as a sum of consecutive naturals, for example, 28339113 + ... + 28339179.

It is an arithmetic number, because the mean of its divisors is an integer number (20073600).

Almost surely, 2^1898722782 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1898722782, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2569420800).

1898722782 is an abundant number, since it is smaller than the sum of its proper divisors (3240118818).

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

1898722782 is a wasteful number, since it uses less digits than its factorization.

1898722782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151 (or 133 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 54.

The square root of 1898722782 is about 43574.3362772171. The cubic root of 1898722782 is about 1238.2847386304.

The spelling of 1898722782 in words is "one billion, eight hundred ninety-eight million, seven hundred twenty-two thousand, seven hundred eighty-two".