428212715 has 48 divisors (see below), whose sum is σ = 614615040. Its totient is φ = 285485760.

The previous prime is 428212699. The next prime is 428212727. The reversal of 428212715 is 517212824.

It is not a de Polignac number, because 428212715 - 2⁴ = 428212699 is a prime.

It is a super-2 number, since 2×428212715² = 366732258575342450, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1791566 + ... + 1791804.

It is an arithmetic number, because the mean of its divisors is an integer number (12804480).

Almost surely, 2^428212715 is an apocalyptic number.

428212715 is a deficient number, since it is larger than the sum of its proper divisors (186402325).

428212715 is a wasteful number, since it uses less digits than its factorization.

428212715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432 (or 425 counting only the distinct ones).

The product of its digits is 8960, while the sum is 32.

The square root of 428212715 is about 20693.3012107783. The cubic root of 428212715 is about 753.7370314968.

The spelling of 428212715 in words is "four hundred twenty-eight million, two hundred twelve thousand, seven hundred fifteen".