727447664 has 10 divisors (see below), whose sum is σ = 1409429880. Its totient is φ = 363723824.

The previous prime is 727447621. The next prime is 727447667. The reversal of 727447664 is 466744727.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (727447667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22732724 + ... + 22732755.

It is an arithmetic number, because the mean of its divisors is an integer number (140942988).

Almost surely, 2^727447664 is an apocalyptic number.

It is an amenable number.

727447664 is a deficient number, since it is larger than the sum of its proper divisors (681982216).

727447664 is a wasteful number, since it uses less digits than its factorization.

727447664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45465487 (or 45465481 counting only the distinct ones).

The product of its digits is 1580544, while the sum is 47.

The square root of 727447664 is about 26971.2377172424. The cubic root of 727447664 is about 899.3607246272.

It can be divided in two parts, 72744 and 7664, that added together give a palindrome (80408).

The spelling of 727447664 in words is "seven hundred twenty-seven million, four hundred forty-seven thousand, six hundred sixty-four".