728464019 has 2 divisors, whose sum is σ = 728464020. Its totient is φ = 728464018.

The previous prime is 728464001. The next prime is 728464043. The reversal of 728464019 is 910464827.

It is a weak prime.

It is an emirp because it is prime and its reverse (910464827) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 728464019 - 2²⁴ = 711686803 is a prime.

It is a super-2 number, since 2×728464019² = 1061319653955264722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (728464049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364232009 + 364232010.

It is an arithmetic number, because the mean of its divisors is an integer number (364232010).

Almost surely, 2^728464019 is an apocalyptic number.

728464019 is a deficient number, since it is larger than the sum of its proper divisors (1).

728464019 is an equidigital number, since it uses as much as digits as its factorization.

728464019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 728464019 is about 26990.0726008657. The cubic root of 728464019 is about 899.7793776092.

The spelling of 728464019 in words is "seven hundred twenty-eight million, four hundred sixty-four thousand, nineteen".