728122043 has 4 divisors (see below), whose sum is σ = 794314968. Its totient is φ = 661929120.

The previous prime is 728122037. The next prime is 728122049. The reversal of 728122043 is 340221827.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (728122037) and next prime (728122049).

It is a cyclic number.

It is not a de Polignac number, because 728122043 - 2¹² = 728117947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 728121997 and 728122015.

It is not an unprimeable number, because it can be changed into a prime (728122049) 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, 33096446 + ... + 33096467.

It is an arithmetic number, because the mean of its divisors is an integer number (198578742).

Almost surely, 2^728122043 is an apocalyptic number.

728122043 is a deficient number, since it is larger than the sum of its proper divisors (66192925).

728122043 is a wasteful number, since it uses less digits than its factorization.

728122043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66192924.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 728122043 is about 26983.7366389461. The cubic root of 728122043 is about 899.6385556847.

The spelling of 728122043 in words is "seven hundred twenty-eight million, one hundred twenty-two thousand, forty-three".