428574691 has 4 divisors (see below), whose sum is σ = 428788152. Its totient is φ = 428361232.

The previous prime is 428574649. The next prime is 428574703. The reversal of 428574691 is 196475824.

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 428574691 - 2⁷ = 428574563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428574631) 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, 103690 + ... + 107743.

It is an arithmetic number, because the mean of its divisors is an integer number (107197038).

Almost surely, 2^428574691 is an apocalyptic number.

428574691 is a deficient number, since it is larger than the sum of its proper divisors (213461).

428574691 is a wasteful number, since it uses less digits than its factorization.

428574691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213460.

The product of its digits is 483840, while the sum is 46.

The square root of 428574691 is about 20702.0455752566. The cubic root of 428574691 is about 753.9493542240.

The spelling of 428574691 in words is "four hundred twenty-eight million, five hundred seventy-four thousand, six hundred ninety-one".