428078769 has 8 divisors (see below), whose sum is σ = 571272192. Its totient is φ = 285135600.

The previous prime is 428078767. The next prime is 428078771. The reversal of 428078769 is 967870824.

It is an interprime number because it is at equal distance from previous prime (428078767) and next prime (428078771).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 428078769 - 2¹ = 428078767 is a prime.

It is a super-2 number, since 2×428078769² = 366502864937110722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (428078767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58534 + ... + 65439.

It is an arithmetic number, because the mean of its divisors is an integer number (71409024).

Almost surely, 2^428078769 is an apocalyptic number.

It is an amenable number.

428078769 is a deficient number, since it is larger than the sum of its proper divisors (143193423).

428078769 is a wasteful number, since it uses less digits than its factorization.

428078769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125127.

The product of its (nonzero) digits is 1354752, while the sum is 51.

The square root of 428078769 is about 20690.0644996578. The cubic root of 428078769 is about 753.6584330296.

The spelling of 428078769 in words is "four hundred twenty-eight million, seventy-eight thousand, seven hundred sixty-nine".