1897040444 has 12 divisors (see below), whose sum is σ = 3575191704. Its totient is φ = 875557104.

The previous prime is 1897040441. The next prime is 1897040449. The reversal of 1897040444 is 4440407981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1897040441) 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 3 ways as a sum of consecutive naturals, for example, 18240722 + ... + 18240825.

It is an arithmetic number, because the mean of its divisors is an integer number (297932642).

Almost surely, 2^1897040444 is an apocalyptic number.

It is an amenable number.

1897040444 is a deficient number, since it is larger than the sum of its proper divisors (1678151260).

1897040444 is a wasteful number, since it uses less digits than its factorization.

1897040444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36481564 (or 36481562 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 1897040444 is about 43555.0277694780. The cubic root of 1897040444 is about 1237.9189086698.

The spelling of 1897040444 in words is "one billion, eight hundred ninety-seven million, forty thousand, four hundred forty-four".