428522442623 has 4 divisors (see below), whose sum is σ = 467479028328. Its totient is φ = 389565856920.

The previous prime is 428522442599. The next prime is 428522442629. The reversal of 428522442623 is 326244225824.

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 428522442623 - 2⁶ = 428522442559 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 (428522442629) 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, 19478292836 + ... + 19478292857.

It is an arithmetic number, because the mean of its divisors is an integer number (116869757082).

Almost surely, 2^428522442623 is an apocalyptic number.

428522442623 is a deficient number, since it is larger than the sum of its proper divisors (38956585705).

428522442623 is a wasteful number, since it uses less digits than its factorization.

428522442623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38956585704.

The product of its digits is 1474560, while the sum is 44.

The spelling of 428522442623 in words is "four hundred twenty-eight billion, five hundred twenty-two million, four hundred forty-two thousand, six hundred twenty-three".