428566161 has 4 divisors (see below), whose sum is σ = 571421552. Its totient is φ = 285710772.

The previous prime is 428566157. The next prime is 428566169. The reversal of 428566161 is 161665824.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 428566161 - 2² = 428566157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428566169) 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, 71427691 + ... + 71427696.

It is an arithmetic number, because the mean of its divisors is an integer number (142855388).

Almost surely, 2^428566161 is an apocalyptic number.

It is an amenable number.

428566161 is a deficient number, since it is larger than the sum of its proper divisors (142855391).

428566161 is a wasteful number, since it uses less digits than its factorization.

428566161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142855390.

The product of its digits is 69120, while the sum is 39.

The square root of 428566161 is about 20701.8395559428. The cubic root of 428566161 is about 753.9443521938.

The spelling of 428566161 in words is "four hundred twenty-eight million, five hundred sixty-six thousand, one hundred sixty-one".