720648286 has 4 divisors (see below), whose sum is σ = 1080972432. Its totient is φ = 360324142.

The previous prime is 720648277. The next prime is 720648287. The reversal of 720648286 is 682846027.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×720648286² = 1038667904229475592, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720648287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180162070 + ... + 180162073.

It is an arithmetic number, because the mean of its divisors is an integer number (270243108).

Almost surely, 2^720648286 is an apocalyptic number.

720648286 is a deficient number, since it is larger than the sum of its proper divisors (360324146).

720648286 is a wasteful number, since it uses less digits than its factorization.

720648286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360324145.

The product of its (nonzero) digits is 258048, while the sum is 43.

The square root of 720648286 is about 26844.8931083735. The cubic root of 720648286 is about 896.5498715743.

The spelling of 720648286 in words is "seven hundred twenty million, six hundred forty-eight thousand, two hundred eighty-six".