428219715 has 128 divisors (see below), whose sum is σ = 917194752. Its totient is φ = 165150720.

The previous prime is 428219677. The next prime is 428219791. The reversal of 428219715 is 517912824.

It is not a de Polignac number, because 428219715 - 2⁹ = 428219203 is a prime.

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 127 ways as a sum of consecutive naturals, for example, 2218659 + ... + 2218851.

It is an arithmetic number, because the mean of its divisors is an integer number (7165584).

Almost surely, 2^428219715 is an apocalyptic number.

428219715 is an abundant number, since it is smaller than the sum of its proper divisors (488975037).

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

428219715 is a wasteful number, since it uses less digits than its factorization.

428219715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349.

The product of its digits is 40320, while the sum is 39.

The square root of 428219715 is about 20693.4703469476. The cubic root of 428219715 is about 753.7411385915.

The spelling of 428219715 in words is "four hundred twenty-eight million, two hundred nineteen thousand, seven hundred fifteen".