428173434 has 24 divisors (see below), whose sum is σ = 999071892. Its totient is φ = 131745600.

The previous prime is 428173433. The next prime is 428173439. The reversal of 428173434 is 434371824.

It can be written as a sum of positive squares in 2 ways, for example, as 421686225 + 6487209 = 20535^2 + 2547^2 .

It is not an unprimeable number, because it can be changed into a prime (428173433) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 914667 + ... + 915134.

Almost surely, 2^428173434 is an apocalyptic number.

428173434 is an abundant number, since it is smaller than the sum of its proper divisors (570898458).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

428173434 is a wasteful number, since it uses less digits than its factorization.

428173434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1829822 (or 1829819 counting only the distinct ones).

The product of its digits is 64512, while the sum is 36.

The square root of 428173434 is about 20692.3520654371. The cubic root of 428173434 is about 753.7139834114.

The spelling of 428173434 in words is "four hundred twenty-eight million, one hundred seventy-three thousand, four hundred thirty-four".