428254691 has 4 divisors (see below), whose sum is σ = 431335800. Its totient is φ = 425173584.

The previous prime is 428254679. The next prime is 428254711. The reversal of 428254691 is 196452824.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428254691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428254601) 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, 1540346 + ... + 1540623.

It is an arithmetic number, because the mean of its divisors is an integer number (107833950).

Almost surely, 2^428254691 is an apocalyptic number.

428254691 is a deficient number, since it is larger than the sum of its proper divisors (3081109).

428254691 is a wasteful number, since it uses less digits than its factorization.

428254691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3081108.

The product of its digits is 138240, while the sum is 41.

The square root of 428254691 is about 20694.3154271892. The cubic root of 428254691 is about 753.7616593129.

The spelling of 428254691 in words is "four hundred twenty-eight million, two hundred fifty-four thousand, six hundred ninety-one".