1894743840 has 576 divisors, whose sum is σ = 7384245120. Its totient is φ = 405504000.

The previous prime is 1894743827. The next prime is 1894743863. The reversal of 1894743840 is 483474981.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 1894743840.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 18759790 + ... + 18759890.

It is an arithmetic number, because the mean of its divisors is an integer number (12819870).

Almost surely, 2^1894743840 is an apocalyptic number.

1894743840 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 1894743840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3692122560).

1894743840 is an abundant number, since it is smaller than the sum of its proper divisors (5489501280).

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

1894743840 is a wasteful number, since it uses less digits than its factorization.

1894743840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 158 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 48.

The square root of 1894743840 is about 43528.6553892950. The cubic root of 1894743840 is about 1237.4191552124.

The spelling of 1894743840 in words is "one billion, eight hundred ninety-four million, seven hundred forty-three thousand, eight hundred forty".