1897996469040 has 1280 divisors, whose sum is σ = 8077197312000. Its totient is φ = 399823257600.

The previous prime is 1897996469011. The next prime is 1897996469041. The reversal of 1897996469040 is 409646997981.

1897996469040 is a `hidden beast` number, since 1 + 8 + 9 + 79 + 96 + 469 + 0 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 1897996469040.

It is not an unprimeable number, because it can be changed into a prime (1897996469041) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 3066229851 + ... + 3066230469.

It is an arithmetic number, because the mean of its divisors is an integer number (6310310400).

Almost surely, 2^{1897996469040} is an apocalyptic number.

1897996469040 is a gapful number since it is divisible by the number (10) 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 1897996469040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4038598656000).

1897996469040 is an abundant number, since it is smaller than the sum of its proper divisors (6179200842960).

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

1897996469040 is a wasteful number, since it uses less digits than its factorization.

1897996469040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895 (or 883 counting only the distinct ones).

The product of its (nonzero) digits is 211631616, while the sum is 72.

The spelling of 1897996469040 in words is "one trillion, eight hundred ninety-seven billion, nine hundred ninety-six million, four hundred sixty-nine thousand, forty".