1894343136 has 144 divisors (see below), whose sum is σ = 5809031424. Its totient is φ = 538949376.

The previous prime is 1894343117. The next prime is 1894343159. The reversal of 1894343136 is 6313434981.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

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, 1330521 + ... + 1331943.

It is an arithmetic number, because the mean of its divisors is an integer number (40340496).

Almost surely, 2^1894343136 is an apocalyptic number.

1894343136 is a gapful number since it is divisible by the number (16) 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 1894343136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2904515712).

1894343136 is an abundant number, since it is smaller than the sum of its proper divisors (3914688288).

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

1894343136 is a wasteful number, since it uses less digits than its factorization.

1894343136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1733 (or 1718 counting only the distinct ones).

The product of its digits is 186624, while the sum is 42.

The square root of 1894343136 is about 43524.0523848596. The cubic root of 1894343136 is about 1237.3319184837.

The spelling of 1894343136 in words is "one billion, eight hundred ninety-four million, three hundred forty-three thousand, one hundred thirty-six".