428528782457 has 8 divisors (see below), whose sum is σ = 434978727456. Its totient is φ = 422109479232.

The previous prime is 428528782399. The next prime is 428528782471. The reversal of 428528782457 is 754287825824.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 428528782457 - 2¹⁶ = 428528716921 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 428528782457.

It is not an unprimeable number, because it can be changed into a prime (428528782657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7632263 + ... + 7688204.

It is an arithmetic number, because the mean of its divisors is an integer number (54372340932).

Almost surely, 2^428528782457 is an apocalyptic number.

It is an amenable number.

428528782457 is a deficient number, since it is larger than the sum of its proper divisors (6449944999).

428528782457 is a wasteful number, since it uses less digits than its factorization.

428528782457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15320887.

The product of its digits is 80281600, while the sum is 62.

The spelling of 428528782457 in words is "four hundred twenty-eight billion, five hundred twenty-eight million, seven hundred eighty-two thousand, four hundred fifty-seven".