428647278 has 16 divisors (see below), whose sum is σ = 861073920. Its totient is φ = 142252536.

The previous prime is 428647273. The next prime is 428647283. The reversal of 428647278 is 872746824.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (428647273) and next prime (428647283).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428647273) 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, 155998 + ... + 158721.

It is an arithmetic number, because the mean of its divisors is an integer number (53817120).

Almost surely, 2^428647278 is an apocalyptic number.

428647278 is an abundant number, since it is smaller than the sum of its proper divisors (432426642).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

428647278 is a wasteful number, since it uses less digits than its factorization.

428647278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314951.

The product of its digits is 1204224, while the sum is 48.

The square root of 428647278 is about 20703.7986369651. The cubic root of 428647278 is about 753.9919168808.

The spelling of 428647278 in words is "four hundred twenty-eight million, six hundred forty-seven thousand, two hundred seventy-eight".