1894074644 has 96 divisors (see below), whose sum is σ = 4260893952. Its totient is φ = 715392000.

The previous prime is 1894074643. The next prime is 1894074647. The reversal of 1894074644 is 4464704981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1894074643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1370834 + ... + 1372214.

It is an arithmetic number, because the mean of its divisors is an integer number (44384312).

Almost surely, 2^1894074644 is an apocalyptic number.

1894074644 is a gapful number since it is divisible by the number (14) 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 1894074644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2130446976).

1894074644 is an abundant number, since it is smaller than the sum of its proper divisors (2366819308).

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

1894074644 is a wasteful number, since it uses less digits than its factorization.

1894074644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1537 (or 1535 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 47.

The square root of 1894074644 is about 43520.9678660758. The cubic root of 1894074644 is about 1237.2734585684.

The spelling of 1894074644 in words is "one billion, eight hundred ninety-four million, seventy-four thousand, six hundred forty-four".