1678394500 has 48 divisors (see below), whose sum is σ = 3712101120. Its totient is φ = 662844000.

The previous prime is 1678394483. The next prime is 1678394503. The reversal of 1678394500 is 54938761.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1678394503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18255 + ... + 60745.

It is an arithmetic number, because the mean of its divisors is an integer number (77335440).

Almost surely, 2^1678394500 is an apocalyptic number.

1678394500 is a gapful number since it is divisible by the number (10) 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 1678394500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1856050560).

1678394500 is an abundant number, since it is smaller than the sum of its proper divisors (2033706620).

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

1678394500 is a wasteful number, since it uses less digits than its factorization.

1678394500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42589 (or 42577 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 1678394500 is about 40968.2132878650. The cubic root of 1678394500 is about 1188.4055807019.

The spelling of 1678394500 in words is "one billion, six hundred seventy-eight million, three hundred ninety-four thousand, five hundred".