728636284 has 6 divisors (see below), whose sum is σ = 1275113504. Its totient is φ = 364318140.

The previous prime is 728636261. The next prime is 728636291. The reversal of 728636284 is 482636827.

It is a super-2 number, since 2×728636284² = 1061821668722657312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 91079532 + ... + 91079539.

Almost surely, 2^728636284 is an apocalyptic number.

It is an amenable number.

728636284 is a deficient number, since it is larger than the sum of its proper divisors (546477220).

728636284 is a wasteful number, since it uses less digits than its factorization.

728636284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182159075 (or 182159073 counting only the distinct ones).

The product of its digits is 774144, while the sum is 46.

The square root of 728636284 is about 26993.2636781846. The cubic root of 728636284 is about 899.8502977343.

The spelling of 728636284 in words is "seven hundred twenty-eight million, six hundred thirty-six thousand, two hundred eighty-four".