9821428508 has 24 divisors (see below), whose sum is σ = 17565526272. Its totient is φ = 4802853744.

The previous prime is 9821428489. The next prime is 9821428511. The reversal of 9821428508 is 8058241289.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261191 + ... + 296417.

It is an arithmetic number, because the mean of its divisors is an integer number (731896928).

Almost surely, 2^9821428508 is an apocalyptic number.

It is an amenable number.

9821428508 is a deficient number, since it is larger than the sum of its proper divisors (7744097764).

9821428508 is a wasteful number, since it uses less digits than its factorization.

9821428508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36761 (or 36759 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 47.

The square root of 9821428508 is about 99103.1205764985. The cubic root of 9821428508 is about 2141.5335695700.

The spelling of 9821428508 in words is "nine billion, eight hundred twenty-one million, four hundred twenty-eight thousand, five hundred eight".