1897868800 has 120 divisors (see below), whose sum is σ = 4774455576. Its totient is φ = 747479040.

The previous prime is 1897868773. The next prime is 1897868813. The reversal of 1897868800 is 88687981.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 856494 + ... + 858706.

Almost surely, 2^1897868800 is an apocalyptic number.

1897868800 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 1897868800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2387227788).

1897868800 is an abundant number, since it is smaller than the sum of its proper divisors (2876586776).

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

1897868800 is an equidigital number, since it uses as much as digits as its factorization.

1897868800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2308 (or 2287 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 55.

The square root of 1897868800 is about 43564.5360356334. The cubic root of 1897868800 is about 1238.0990644383.

It can be divided in two parts, 18978 and 68800, that added together give a palindrome (87778).

The spelling of 1897868800 in words is "one billion, eight hundred ninety-seven million, eight hundred sixty-eight thousand, eight hundred".