1791678408 has 128 divisors (see below), whose sum is σ = 4920115200. Its totient is φ = 540400896.

The previous prime is 1791678389. The next prime is 1791678419. The reversal of 1791678408 is 8048761971.

It is a super-2 number, since 2×1791678408² = 6420223035386828928, which contains 22 as substring.

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 31 ways as a sum of consecutive naturals, for example, 4081053 + ... + 4081491.

It is an arithmetic number, because the mean of its divisors is an integer number (38438400).

Almost surely, 2^1791678408 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 1791678408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2460057600).

1791678408 is an abundant number, since it is smaller than the sum of its proper divisors (3128436792).

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

1791678408 is a wasteful number, since it uses less digits than its factorization.

1791678408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691 (or 687 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 51.

The square root of 1791678408 is about 42328.2223581383. Note that the first 3 decimals coincide. The cubic root of 1791678408 is about 1214.5629249747.

The spelling of 1791678408 in words is "one billion, seven hundred ninety-one million, six hundred seventy-eight thousand, four hundred eight".