428555877540 has 48 divisors (see below), whose sum is σ = 1371378809472. Its totient is φ = 97955629056.

The previous prime is 428555877523. The next prime is 428555877553. The reversal of 428555877540 is 45778555824.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 510185149 + ... + 510185988.

It is an arithmetic number, because the mean of its divisors is an integer number (28570391864).

Almost surely, 2^428555877540 is an apocalyptic number.

It is an amenable number.

428555877540 is an abundant number, since it is smaller than the sum of its proper divisors (942822931932).

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

428555877540 is a wasteful number, since it uses less digits than its factorization.

428555877540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020371156 (or 1020371154 counting only the distinct ones).

The product of its (nonzero) digits is 62720000, while the sum is 60.

The spelling of 428555877540 in words is "four hundred twenty-eight billion, five hundred fifty-five million, eight hundred seventy-seven thousand, five hundred forty".