428522442621 has 64 divisors (see below), whose sum is σ = 708689780736. Its totient is φ = 224277984000.

The previous prime is 428522442599. The next prime is 428522442629. The reversal of 428522442621 is 126244225824.

It is not a de Polignac number, because 428522442621 - 2⁵ = 428522442589 is a prime.

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 63 ways as a sum of consecutive naturals, for example, 38785320 + ... + 38796366.

It is an arithmetic number, because the mean of its divisors is an integer number (11073277824).

Almost surely, 2^428522442621 is an apocalyptic number.

It is an amenable number.

428522442621 is a deficient number, since it is larger than the sum of its proper divisors (280167338115).

428522442621 is a wasteful number, since it uses less digits than its factorization.

428522442621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12162.

The product of its digits is 491520, while the sum is 42.

The spelling of 428522442621 in words is "four hundred twenty-eight billion, five hundred twenty-two million, four hundred forty-two thousand, six hundred twenty-one".