1838591946 has 56 divisors (see below), whose sum is σ = 4235930244. Its totient is φ = 597896640.

The previous prime is 1838591941. The next prime is 1838591959. The reversal of 1838591946 is 6491958381.

1838591946 is a `hidden beast` number, since 1 + 8 + 3 + 8 + 591 + 9 + 46 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1651203225 + 187388721 = 40635^2 + 13689^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1838591892 and 1838591901.

It is not an unprimeable number, because it can be changed into a prime (1838591941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 44400 + ... + 75156.

Almost surely, 2^1838591946 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1838591946, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2117965122).

1838591946 is an abundant number, since it is smaller than the sum of its proper divisors (2397338298).

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

1838591946 is an equidigital number, since it uses as much as digits as its factorization.

1838591946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30818 (or 30803 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 54.

The square root of 1838591946 is about 42878.8053238427. The cubic root of 1838591946 is about 1225.0724812868.

The spelling of 1838591946 in words is "one billion, eight hundred thirty-eight million, five hundred ninety-one thousand, nine hundred forty-six".