728865412 has 24 divisors (see below), whose sum is σ = 1473323040. Its totient is φ = 311813760.

The previous prime is 728865383. The next prime is 728865419. The reversal of 728865412 is 214568827.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (728865419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 486462 + ... + 487957.

It is an arithmetic number, because the mean of its divisors is an integer number (61388460).

Almost surely, 2^728865412 is an apocalyptic number.

It is an amenable number.

728865412 is an abundant number, since it is smaller than the sum of its proper divisors (744457628).

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

728865412 is a wasteful number, since it uses less digits than its factorization.

728865412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974451 (or 974449 counting only the distinct ones).

The product of its digits is 215040, while the sum is 43.

The square root of 728865412 is about 26997.5075145836. The cubic root of 728865412 is about 899.9446105830.

The spelling of 728865412 in words is "seven hundred twenty-eight million, eight hundred sixty-five thousand, four hundred twelve".