1678192812 has 72 divisors (see below), whose sum is σ = 4485866112. Its totient is φ = 528134400.

The previous prime is 1678192787. The next prime is 1678192819. The reversal of 1678192812 is 2182918761.

It is a super-2 number, since 2×1678192812² = 5632662228496934688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1678192819) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27418 + ... + 64094.

It is an arithmetic number, because the mean of its divisors is an integer number (62303696).

Almost surely, 2^1678192812 is an apocalyptic number.

1678192812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1678192812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2242933056).

1678192812 is an abundant number, since it is smaller than the sum of its proper divisors (2807673300).

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

1678192812 is a wasteful number, since it uses less digits than its factorization.

1678192812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36759 (or 36754 counting only the distinct ones).

The product of its digits is 96768, while the sum is 45.

The square root of 1678192812 is about 40965.7516957763. The cubic root of 1678192812 is about 1188.3579763304.

The spelling of 1678192812 in words is "one billion, six hundred seventy-eight million, one hundred ninety-two thousand, eight hundred twelve".