727638136 has 16 divisors (see below), whose sum is σ = 1436128200. Its totient is φ = 344670624.

The previous prime is 727638133. The next prime is 727638137. The reversal of 727638136 is 631836727.

It is a junction number, because it is equal to n+sod(n) for n = 727638092 and 727638101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (727638133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2393395 + ... + 2393698.

Almost surely, 2^727638136 is an apocalyptic number.

727638136 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

727638136 is a deficient number, since it is larger than the sum of its proper divisors (708490064).

727638136 is a wasteful number, since it uses less digits than its factorization.

727638136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4787118 (or 4787114 counting only the distinct ones).

The product of its digits is 254016, while the sum is 43.

The square root of 727638136 is about 26974.7685068844. The cubic root of 727638136 is about 899.4392127877.

The spelling of 727638136 in words is "seven hundred twenty-seven million, six hundred thirty-eight thousand, one hundred thirty-six".