728268890 has 8 divisors (see below), whose sum is σ = 1310884020. Its totient is φ = 291307552.

The previous prime is 728268781. The next prime is 728268907. The reversal of 728268890 is 98862827.

It can be written as a sum of positive squares in 2 ways, for example, as 707081281 + 21187609 = 26591^2 + 4603^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×728268890² = 1060751152283664200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36413435 + ... + 36413454.

Almost surely, 2^728268890 is an apocalyptic number.

728268890 is a deficient number, since it is larger than the sum of its proper divisors (582615130).

728268890 is a wasteful number, since it uses less digits than its factorization.

728268890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72826896.

The product of its (nonzero) digits is 774144, while the sum is 50.

The square root of 728268890 is about 26986.4575296574. The cubic root of 728268890 is about 899.6990310515.

The spelling of 728268890 in words is "seven hundred twenty-eight million, two hundred sixty-eight thousand, eight hundred ninety".