428012428 has 12 divisors (see below), whose sum is σ = 781588080. Its totient is φ = 204701552.

The previous prime is 428012423. The next prime is 428012437. The reversal of 428012428 is 824210824.

It is a self number, because there is not a number n which added to its sum of digits gives 428012428.

It is not an unprimeable number, because it can be changed into a prime (428012423) 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, 2326063 + ... + 2326246.

It is an arithmetic number, because the mean of its divisors is an integer number (65132340).

Almost surely, 2^428012428 is an apocalyptic number.

It is an amenable number.

428012428 is a deficient number, since it is larger than the sum of its proper divisors (353575652).

428012428 is a wasteful number, since it uses less digits than its factorization.

428012428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4652336 (or 4652334 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 31.

The square root of 428012428 is about 20688.4612284239. The cubic root of 428012428 is about 753.6194985774.

The spelling of 428012428 in words is "four hundred twenty-eight million, twelve thousand, four hundred twenty-eight".