428071323 has 4 divisors (see below), whose sum is σ = 570761768. Its totient is φ = 285380880.

The previous prime is 428071309. The next prime is 428071327. The reversal of 428071323 is 323170824.

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

It is not a de Polignac number, because 428071323 - 2²⁰ = 427022747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428071327) 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, 71345218 + ... + 71345223.

It is an arithmetic number, because the mean of its divisors is an integer number (142690442).

Almost surely, 2^428071323 is an apocalyptic number.

428071323 is a deficient number, since it is larger than the sum of its proper divisors (142690445).

428071323 is a wasteful number, since it uses less digits than its factorization.

428071323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142690444.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 428071323 is about 20689.8845574353. The cubic root of 428071323 is about 753.6540632940.

The spelling of 428071323 in words is "four hundred twenty-eight million, seventy-one thousand, three hundred twenty-three".