428709061 has 4 divisors (see below), whose sum is σ = 467682624. Its totient is φ = 389735500.

The previous prime is 428709053. The next prime is 428709091. The reversal of 428709061 is 160907824.

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 428709061 - 2³ = 428709053 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 428709061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428709091) 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, 19486765 + ... + 19486786.

It is an arithmetic number, because the mean of its divisors is an integer number (116920656).

Almost surely, 2^428709061 is an apocalyptic number.

It is an amenable number.

428709061 is a deficient number, since it is larger than the sum of its proper divisors (38973563).

428709061 is a wasteful number, since it uses less digits than its factorization.

428709061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38973562.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 428709061 is about 20705.2906523912. The cubic root of 428709061 is about 754.0281406379.

The spelling of 428709061 in words is "four hundred twenty-eight million, seven hundred nine thousand, sixty-one".