1897153728 has 28 divisors (see below), whose sum is σ = 5019553080. Its totient is φ = 632384512.

The previous prime is 1897153721. The next prime is 1897153729. The reversal of 1897153728 is 8273517981.

It is not an unprimeable number, because it can be changed into a prime (1897153721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4940313 + ... + 4940696.

Almost surely, 2^1897153728 is an apocalyptic number.

It is an amenable number.

1897153728 is an abundant number, since it is smaller than the sum of its proper divisors (3122399352).

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

1897153728 is an equidigital number, since it uses as much as digits as its factorization.

1897153728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9881024 (or 9881014 counting only the distinct ones).

The product of its digits is 846720, while the sum is 51.

The square root of 1897153728 is about 43556.3282199039. The cubic root of 1897153728 is about 1237.9435494402.

The spelling of 1897153728 in words is "one billion, eight hundred ninety-seven million, one hundred fifty-three thousand, seven hundred twenty-eight".