428645807424 has 84 divisors (see below), whose sum is σ = 1231474025236. Its totient is φ = 142551871488.

The previous prime is 428645807371. The next prime is 428645807519. The reversal of 428645807424 is 424708546824.

It is a happy number.

428645807424 is a `hidden beast` number, since 42 + 86 + 458 + 0 + 74 + 2 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 253895054400 + 174750753024 = 503880^2 + 418032^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 609919 + ... + 1108734.

Almost surely, 2^428645807424 is an apocalyptic number.

It is an amenable number.

428645807424 is an abundant number, since it is smaller than the sum of its proper divisors (802828217812).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

428645807424 is a wasteful number, since it uses less digits than its factorization.

428645807424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1719104 (or 1719091 counting only the distinct ones).

The product of its (nonzero) digits is 13762560, while the sum is 54.

The spelling of 428645807424 in words is "four hundred twenty-eight billion, six hundred forty-five million, eight hundred seven thousand, four hundred twenty-four".