727649856 has 84 divisors (see below), whose sum is σ = 2153009664. Its totient is φ = 234720000.

The previous prime is 727649851. The next prime is 727649863. The reversal of 727649856 is 658946727.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (727649851) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2520 + ... + 38231.

Almost surely, 2^727649856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 727649856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1076504832).

727649856 is an abundant number, since it is smaller than the sum of its proper divisors (1425359808).

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

727649856 is a wasteful number, since it uses less digits than its factorization.

727649856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40800 (or 40787 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 54.

The square root of 727649856 is about 26974.9857460574. The cubic root of 727649856 is about 899.4440418231. Note that the first 3 decimals are identical.

The spelling of 727649856 in words is "seven hundred twenty-seven million, six hundred forty-nine thousand, eight hundred fifty-six".