428421078 has 12 divisors (see below), whose sum is σ = 928245708. Its totient is φ = 142807020.

The previous prime is 428421073. The next prime is 428421109. The reversal of 428421078 is 870124824.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428421073) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11900568 + ... + 11900603.

It is an arithmetic number, because the mean of its divisors is an integer number (77353809).

Almost surely, 2^428421078 is an apocalyptic number.

428421078 is an abundant number, since it is smaller than the sum of its proper divisors (499824630).

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

428421078 is a wasteful number, since it uses less digits than its factorization.

428421078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23801179 (or 23801176 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The square root of 428421078 is about 20698.3351504414. The cubic root of 428421078 is about 753.8592647059.

The spelling of 428421078 in words is "four hundred twenty-eight million, four hundred twenty-one thousand, seventy-eight".