1822352778 has 12 divisors (see below), whose sum is σ = 3948431058. Its totient is φ = 607450920.

The previous prime is 1822352737. The next prime is 1822352827. The reversal of 1822352778 is 8772532281.

It can be written as a sum of positive squares in only one way, i.e., 1472026689 + 350326089 = 38367^2 + 18717^2 .

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 5 ways as a sum of consecutive naturals, for example, 50620893 + ... + 50620928.

Almost surely, 2^1822352778 is an apocalyptic number.

1822352778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1822352778 is an abundant number, since it is smaller than the sum of its proper divisors (2126078280).

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

1822352778 is a wasteful number, since it uses less digits than its factorization.

1822352778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101241829 (or 101241826 counting only the distinct ones).

The product of its digits is 376320, while the sum is 45.

The square root of 1822352778 is about 42689.0240928508. The cubic root of 1822352778 is about 1221.4550358832.

The spelling of 1822352778 in words is "one billion, eight hundred twenty-two million, three hundred fifty-two thousand, seven hundred seventy-eight".