289784115856 has 45 divisors (see below), whose sum is σ = 571384729353. Its totient is φ = 142373815680.

The previous prime is 289784115833. The next prime is 289784115857. The reversal of 289784115856 is 658511487982.

The square root of 289784115856 is 538316.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 174292890256 + 115491225600 = 417484^2 + 339840^2 .

It is a super-2 number, since 2×289784115856² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (289784115857) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 127041436 + ... + 127043716.

Almost surely, 2^289784115856 is an apocalyptic number.

289784115856 is the 538316-th square number.

It is an amenable number.

289784115856 is a deficient number, since it is larger than the sum of its proper divisors (281600613497).

289784115856 is an frugal number, since it uses more digits than its factorization.

289784115856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4688 (or 2342 counting only the distinct ones).

The product of its digits is 38707200, while the sum is 64.

Multiplying 289784115856 by its sum of digits (64), we get a square (18546183414784 = 4306528²).

The spelling of 289784115856 in words is "two hundred eighty-nine billion, seven hundred eighty-four million, one hundred fifteen thousand, eight hundred fifty-six".