9801385428 has 48 divisors (see below), whose sum is σ = 24778353600. Its totient is φ = 3003431424.

The previous prime is 9801385427. The next prime is 9801385457. The reversal of 9801385428 is 8245831089.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9801385427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 549903 + ... + 567446.

It is an arithmetic number, because the mean of its divisors is an integer number (516215700).

Almost surely, 2^9801385428 is an apocalyptic number.

It is an amenable number.

9801385428 is an abundant number, since it is smaller than the sum of its proper divisors (14976968172).

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

9801385428 is a wasteful number, since it uses less digits than its factorization.

9801385428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117416 (or 1117414 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 48.

The square root of 9801385428 is about 99001.9465869232. The cubic root of 9801385428 is about 2140.0757992775.

The spelling of 9801385428 in words is "nine billion, eight hundred one million, three hundred eighty-five thousand, four hundred twenty-eight".