728838031 has 2 divisors, whose sum is σ = 728838032. Its totient is φ = 728838030.

The previous prime is 728838001. The next prime is 728838049. The reversal of 728838031 is 130838827.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 728838031 - 2¹⁵ = 728805263 is a prime.

It is a super-2 number, since 2×728838031² = 1062409750863913922, which contains 22 as substring.

It is a plaindrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728838001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364419015 + 364419016.

It is an arithmetic number, because the mean of its divisors is an integer number (364419016).

Almost surely, 2^728838031 is an apocalyptic number.

728838031 is a deficient number, since it is larger than the sum of its proper divisors (1).

728838031 is an equidigital number, since it uses as much as digits as its factorization.

728838031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 728838031 is about 26997.0004074527. Note that the first 3 decimals coincide. The cubic root of 728838031 is about 899.9333411535.

The spelling of 728838031 in words is "seven hundred twenty-eight million, eight hundred thirty-eight thousand, thirty-one".