428432078 has 16 divisors (see below), whose sum is σ = 648198720. Its totient is φ = 212373216.

The previous prime is 428432077. The next prime is 428432111. The reversal of 428432078 is 870234824.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428432071) 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, 135803 + ... + 138921.

It is an arithmetic number, because the mean of its divisors is an integer number (40512420).

Almost surely, 2^428432078 is an apocalyptic number.

428432078 is a deficient number, since it is larger than the sum of its proper divisors (219766642).

428432078 is a wasteful number, since it uses less digits than its factorization.

428432078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3691.

The product of its (nonzero) digits is 86016, while the sum is 38.

The square root of 428432078 is about 20698.6008705903. The cubic root of 428432078 is about 753.8657165990.

The spelling of 428432078 in words is "four hundred twenty-eight million, four hundred thirty-two thousand, seventy-eight".