428564726978 has 16 divisors (see below), whose sum is σ = 676707372000. Its totient is φ = 202996477152.

The previous prime is 428564726963. The next prime is 428564726987. The reversal of 428564726978 is 879627465824.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 841718 + ... + 1251246.

It is an arithmetic number, because the mean of its divisors is an integer number (42294210750).

Almost surely, 2^428564726978 is an apocalyptic number.

428564726978 is a deficient number, since it is larger than the sum of its proper divisors (248142645022).

428564726978 is a wasteful number, since it uses less digits than its factorization.

428564726978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437089.

The product of its digits is 325140480, while the sum is 68.

The spelling of 428564726978 in words is "four hundred twenty-eight billion, five hundred sixty-four million, seven hundred twenty-six thousand, nine hundred seventy-eight".