72728011 has 2 divisors, whose sum is σ = 72728012. Its totient is φ = 72728010.

The previous prime is 72727987. The next prime is 72728039. The reversal of 72728011 is 11082727.

It is an a-pointer prime, because the next prime (72728039) can be obtained adding 72728011 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72728011 - 2¹¹ = 72725963 is a prime.

It is a super-2 number, since 2×72728011² = 10578727168032242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72728311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36364005 + 36364006.

It is an arithmetic number, because the mean of its divisors is an integer number (36364006).

Almost surely, 2^72728011 is an apocalyptic number.

72728011 is a deficient number, since it is larger than the sum of its proper divisors (1).

72728011 is an equidigital number, since it uses as much as digits as its factorization.

72728011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 72728011 is about 8528.0719391900. The cubic root of 72728011 is about 417.4142169004.

The spelling of 72728011 in words is "seventy-two million, seven hundred twenty-eight thousand, eleven".