1897543228 has 48 divisors (see below), whose sum is σ = 3883320000. Its totient is φ = 810969600.

The previous prime is 1897543223. The next prime is 1897543237. The reversal of 1897543228 is 8223457981.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1897543223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 548448 + ... + 551896.

It is an arithmetic number, because the mean of its divisors is an integer number (80902500).

Almost surely, 2^1897543228 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 1897543228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1941660000).

1897543228 is an abundant number, since it is smaller than the sum of its proper divisors (1985776772).

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

1897543228 is a wasteful number, since it uses less digits than its factorization.

1897543228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3875 (or 3859 counting only the distinct ones).

The product of its digits is 967680, while the sum is 49.

The square root of 1897543228 is about 43560.7992121357. The cubic root of 1897543228 is about 1238.0282633656.

The spelling of 1897543228 in words is "one billion, eight hundred ninety-seven million, five hundred forty-three thousand, two hundred twenty-eight".