428156727 has 16 divisors (see below), whose sum is σ = 585446400. Its totient is φ = 278168000.

The previous prime is 428156689. The next prime is 428156749. The reversal of 428156727 is 727651824.

It is a cyclic number.

It is not a de Polignac number, because 428156727 - 2¹⁵ = 428123959 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428146727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177274 + ... + 179672.

It is an arithmetic number, because the mean of its divisors is an integer number (36590400).

Almost surely, 2^428156727 is an apocalyptic number.

428156727 is a deficient number, since it is larger than the sum of its proper divisors (157289673).

428156727 is a wasteful number, since it uses less digits than its factorization.

428156727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3894.

The product of its digits is 188160, while the sum is 42.

The square root of 428156727 is about 20691.9483616212. The cubic root of 428156727 is about 753.7041801695.

The spelling of 428156727 in words is "four hundred twenty-eight million, one hundred fifty-six thousand, seven hundred twenty-seven".