428228604 has 18 divisors (see below), whose sum is σ = 1082466840. Its totient is φ = 142742856.

The previous prime is 428228599. The next prime is 428228617. The reversal of 428228604 is 406822824.

It is a happy number.

428228604 is a `hidden beast` number, since 4 + 28 + 2 + 28 + 604 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 11895239 = 428228604 / (4 + 2 + 8 + 2 + 2 + 8 + 6 + 0 + 4).

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5947584 + ... + 5947655.

Almost surely, 2^428228604 is an apocalyptic number.

It is an amenable number.

428228604 is an abundant number, since it is smaller than the sum of its proper divisors (654238236).

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

428228604 is a wasteful number, since it uses less digits than its factorization.

428228604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11895249 (or 11895244 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 36.

The square root of 428228604 is about 20693.6851237280. The cubic root of 428228604 is about 753.7463539505.

The spelling of 428228604 in words is "four hundred twenty-eight million, two hundred twenty-eight thousand, six hundred four".