428212287 has 6 divisors (see below), whose sum is σ = 618528872. Its totient is φ = 285474852.

The previous prime is 428212283. The next prime is 428212307. The reversal of 428212287 is 782212824.

428212287 is a `hidden beast` number, since 428 + 2 + 1 + 228 + 7 = 666.

It is not a de Polignac number, because 428212287 - 2² = 428212283 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428212283) 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, 23789563 + ... + 23789580.

Almost surely, 2^428212287 is an apocalyptic number.

428212287 is a deficient number, since it is larger than the sum of its proper divisors (190316585).

428212287 is a wasteful number, since it uses less digits than its factorization.

428212287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47579149 (or 47579146 counting only the distinct ones).

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

The square root of 428212287 is about 20693.2908692648. The cubic root of 428212287 is about 753.7367803759.

The spelling of 428212287 in words is "four hundred twenty-eight million, two hundred twelve thousand, two hundred eighty-seven".