428820375 has 32 divisors (see below), whose sum is σ = 715186368. Its totient is φ = 228182400.

The previous prime is 428820347. The next prime is 428820377. The reversal of 428820375 is 573028824.

It is not a de Polignac number, because 428820375 - 2⁶ = 428820311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428820377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 207849 + ... + 209901.

It is an arithmetic number, because the mean of its divisors is an integer number (22349574).

Almost surely, 2^428820375 is an apocalyptic number.

428820375 is a deficient number, since it is larger than the sum of its proper divisors (286365993).

428820375 is a wasteful number, since it uses less digits than its factorization.

428820375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2628 (or 2618 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 39.

The square root of 428820375 is about 20707.9785348546. The cubic root of 428820375 is about 754.0933959456.

The spelling of 428820375 in words is "four hundred twenty-eight million, eight hundred twenty thousand, three hundred seventy-five".