1861522344 has 256 divisors, whose sum is σ = 5867769600. Its totient is φ = 541900800.

The previous prime is 1861522307. The next prime is 1861522361. The reversal of 1861522344 is 4432251681.

It is a happy number.

1861522344 is a `hidden beast` number, since 1 + 8 + 615 + 2 + 2 + 34 + 4 = 666.

It is a super-2 number, since 2×1861522344² = 6930530874422508672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1861522299 and 1861522308.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 9449254 + ... + 9449450.

It is an arithmetic number, because the mean of its divisors is an integer number (22920975).

Almost surely, 2^1861522344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1861522344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2933884800).

1861522344 is an abundant number, since it is smaller than the sum of its proper divisors (4006247256).

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

1861522344 is a wasteful number, since it uses less digits than its factorization.

1861522344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361 (or 351 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 1861522344 is about 43145.3629489891. The cubic root of 1861522344 is about 1230.1443732972.

The spelling of 1861522344 in words is "one billion, eight hundred sixty-one million, five hundred twenty-two thousand, three hundred forty-four".