428288921038488 has 32 divisors (see below), whose sum is σ = 1117275446188800. Its totient is φ = 136555887867168.

The previous prime is 428288921038487. The next prime is 428288921038579. The reversal of 428288921038488 is 884830129882824.

It is a super-2 number, since 2×428288921038488² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428288921038487) 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, 387942862708 + ... + 387942863811.

It is an arithmetic number, because the mean of its divisors is an integer number (34914857693400).

Almost surely, 2^{428288921038488} is an apocalyptic number.

It is an amenable number.

428288921038488 is an abundant number, since it is smaller than the sum of its proper divisors (688986525150312).

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

428288921038488 is a wasteful number, since it uses less digits than its factorization.

428288921038488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775885726551 (or 775885726547 counting only the distinct ones).

The product of its (nonzero) digits is 905969664, while the sum is 75.

The spelling of 428288921038488 in words is "four hundred twenty-eight trillion, two hundred eighty-eight billion, nine hundred twenty-one million, thirty-eight thousand, four hundred eighty-eight".