428525212778 has 64 divisors (see below), whose sum is σ = 722689067520. Its totient is φ = 189295142400.

The previous prime is 428525212751. The next prime is 428525212781. The reversal of 428525212778 is 877212525824.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13205393 + ... + 13237803.

It is an arithmetic number, because the mean of its divisors is an integer number (11292016680).

Almost surely, 2^428525212778 is an apocalyptic number.

428525212778 is a deficient number, since it is larger than the sum of its proper divisors (294163854742).

428525212778 is a wasteful number, since it uses less digits than its factorization.

428525212778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32703.

The product of its digits is 5017600, while the sum is 53.

The spelling of 428525212778 in words is "four hundred twenty-eight billion, five hundred twenty-five million, two hundred twelve thousand, seven hundred seventy-eight".