727740646 has 4 divisors (see below), whose sum is σ = 1091610972. Its totient is φ = 363870322.

The previous prime is 727740619. The next prime is 727740647. The reversal of 727740646 is 646047727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 646047727 = 13 ⋅49695979.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (727740647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 181935160 + ... + 181935163.

It is an arithmetic number, because the mean of its divisors is an integer number (272902743).

Almost surely, 2^727740646 is an apocalyptic number.

727740646 is a deficient number, since it is larger than the sum of its proper divisors (363870326).

727740646 is a wasteful number, since it uses less digits than its factorization.

727740646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363870325.

The product of its (nonzero) digits is 395136, while the sum is 43.

The square root of 727740646 is about 26976.6685489517. The cubic root of 727740646 is about 899.4814486097.

The spelling of 727740646 in words is "seven hundred twenty-seven million, seven hundred forty thousand, six hundred forty-six".