428340784 has 10 divisors (see below), whose sum is σ = 829910300. Its totient is φ = 214170384.

The previous prime is 428340779. The next prime is 428340791. The reversal of 428340784 is 487043824.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13385634 + ... + 13385665.

It is an arithmetic number, because the mean of its divisors is an integer number (82991030).

Almost surely, 2^428340784 is an apocalyptic number.

It is an amenable number.

428340784 is a deficient number, since it is larger than the sum of its proper divisors (401569516).

428340784 is a wasteful number, since it uses less digits than its factorization.

428340784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26771307 (or 26771301 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 40.

The square root of 428340784 is about 20696.3954349544. The cubic root of 428340784 is about 753.8121660602.

The spelling of 428340784 in words is "four hundred twenty-eight million, three hundred forty thousand, seven hundred eighty-four".