728125423 has 4 divisors (see below), whose sum is σ = 731305240. Its totient is φ = 724945608.

The previous prime is 728125399. The next prime is 728125451. The reversal of 728125423 is 324521827.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 728125423 - 2²¹ = 726028271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728125523) 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, 1589565 + ... + 1590022.

It is an arithmetic number, because the mean of its divisors is an integer number (182826310).

Almost surely, 2^728125423 is an apocalyptic number.

728125423 is a deficient number, since it is larger than the sum of its proper divisors (3179817).

728125423 is a wasteful number, since it uses less digits than its factorization.

728125423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3179816.

The product of its digits is 26880, while the sum is 34.

The square root of 728125423 is about 26983.7992691911. The cubic root of 728125423 is about 899.6399477470.

The spelling of 728125423 in words is "seven hundred twenty-eight million, one hundred twenty-five thousand, four hundred twenty-three".