428680723 has 4 divisors (see below), whose sum is σ = 429783120. Its totient is φ = 427578328.

The previous prime is 428680691. The next prime is 428680751. The reversal of 428680723 is 327086824.

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 428680723 - 2⁵ = 428680691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428680783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550615 + ... + 551392.

It is an arithmetic number, because the mean of its divisors is an integer number (107445780).

Almost surely, 2^428680723 is an apocalyptic number.

428680723 is a deficient number, since it is larger than the sum of its proper divisors (1102397).

428680723 is a wasteful number, since it uses less digits than its factorization.

428680723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102396.

The product of its (nonzero) digits is 129024, while the sum is 40.

The square root of 428680723 is about 20704.6063232316. The cubic root of 428680723 is about 754.0115263244.

The spelling of 428680723 in words is "four hundred twenty-eight million, six hundred eighty thousand, seven hundred twenty-three".