1894143816 has 96 divisors (see below), whose sum is σ = 5374512000. Its totient is φ = 601840512.

The previous prime is 1894143793. The next prime is 1894143821. The reversal of 1894143816 is 6183414981.

It is a nude number because it is divisible by every one of its digits.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 159211 + ... + 170693.

It is an arithmetic number, because the mean of its divisors is an integer number (55984500).

Almost surely, 2^1894143816 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 1894143816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2687256000).

1894143816 is an abundant number, since it is smaller than the sum of its proper divisors (3480368184).

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

1894143816 is a wasteful number, since it uses less digits than its factorization.

1894143816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11603 (or 11596 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 1894143816 is about 43521.7625562201. The cubic root of 1894143816 is about 1237.2885202131.

The spelling of 1894143816 in words is "one billion, eight hundred ninety-four million, one hundred forty-three thousand, eight hundred sixteen".