428134726 has 4 divisors (see below), whose sum is σ = 642202092. Its totient is φ = 214067362.

The previous prime is 428134709. The next prime is 428134741. The reversal of 428134726 is 627431824.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107033680 + ... + 107033683.

It is an arithmetic number, because the mean of its divisors is an integer number (160550523).

Almost surely, 2^428134726 is an apocalyptic number.

428134726 is a deficient number, since it is larger than the sum of its proper divisors (214067366).

428134726 is a wasteful number, since it uses less digits than its factorization.

428134726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214067365.

The product of its digits is 64512, while the sum is 37.

The square root of 428134726 is about 20691.4167228829. The cubic root of 428134726 is about 753.6912701542.

The spelling of 428134726 in words is "four hundred twenty-eight million, one hundred thirty-four thousand, seven hundred twenty-six".