1894438257572 has 96 divisors (see below), whose sum is σ = 3964966612992. Its totient is φ = 774374173056.

The previous prime is 1894438257541. The next prime is 1894438257577. The reversal of 1894438257572 is 2757528344981.

It is a junction number, because it is equal to n+sod(n) for n = 1894438257499 and 1894438257508.

It is not an unprimeable number, because it can be changed into a prime (1894438257577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 703466258 + ... + 703468950.

It is an arithmetic number, because the mean of its divisors is an integer number (41301735552).

Almost surely, 2^{1894438257572} 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 1894438257572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1982483306496).

1894438257572 is an abundant number, since it is smaller than the sum of its proper divisors (2070528355420).

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

1894438257572 is a wasteful number, since it uses less digits than its factorization.

1894438257572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5457 (or 5455 counting only the distinct ones).

The product of its digits is 135475200, while the sum is 65.

The spelling of 1894438257572 in words is "one trillion, eight hundred ninety-four billion, four hundred thirty-eight million, two hundred fifty-seven thousand, five hundred seventy-two".