728234623 has 2 divisors, whose sum is σ = 728234624. Its totient is φ = 728234622.

The previous prime is 728234621. The next prime is 728234657. The reversal of 728234623 is 326432827.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 728234623 - 2¹ = 728234621 is a prime.

It is a super-2 number, since 2×728234623² = 1060651332271904258, which contains 22 as substring.

Together with 728234621, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728234621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364117311 + 364117312.

It is an arithmetic number, because the mean of its divisors is an integer number (364117312).

Almost surely, 2^728234623 is an apocalyptic number.

728234623 is a deficient number, since it is larger than the sum of its proper divisors (1).

728234623 is an equidigital number, since it uses as much as digits as its factorization.

728234623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 37.

The square root of 728234623 is about 26985.8226296698. The cubic root of 728234623 is about 899.6849197478.

It can be divided in two parts, 7282 and 34623, that added together give a triangular number (41905 = T₂₈₉).

The spelling of 728234623 in words is "seven hundred twenty-eight million, two hundred thirty-four thousand, six hundred twenty-three".