1897790401904 has 20 divisors (see below), whose sum is σ = 3737247084360. Its totient is φ = 933339541440.

The previous prime is 1897790401861. The next prime is 1897790401919. The reversal of 1897790401904 is 4091040977981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 972227714 + ... + 972229665.

It is an arithmetic number, because the mean of its divisors is an integer number (186862354218).

Almost surely, 2^{1897790401904} is an apocalyptic number.

It is an amenable number.

1897790401904 is a deficient number, since it is larger than the sum of its proper divisors (1839456682456).

1897790401904 is a wasteful number, since it uses less digits than its factorization.

1897790401904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1944457448 (or 1944457442 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 59.

The spelling of 1897790401904 in words is "one trillion, eight hundred ninety-seven billion, seven hundred ninety million, four hundred one thousand, nine hundred four".