728190224 has 40 divisors (see below), whose sum is σ = 1435866432. Its totient is φ = 357701760.

The previous prime is 728190167. The next prime is 728190241. The reversal of 728190224 is 422091827.

It is a Cunningham number, because it is equal to 26985²-1.

It is a super-2 number, since 2×728190224² = 1060522004658340352, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214202 + ... + 217574.

Almost surely, 2^728190224 is an apocalyptic number.

It is an amenable number.

728190224 is a deficient number, since it is larger than the sum of its proper divisors (707676208).

728190224 is a wasteful number, since it uses less digits than its factorization.

728190224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3615 (or 3609 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 728190224 is about 26984.9999814712. Note that the first 4 decimals coincide. The cubic root of 728190224 is about 899.6666353830. Note that the first 4 decimals are identical.

The spelling of 728190224 in words is "seven hundred twenty-eight million, one hundred ninety thousand, two hundred twenty-four".