9898529640 has 64 divisors (see below), whose sum is σ = 29703542400. Its totient is φ = 2638900992.

The previous prime is 9898529639. The next prime is 9898529647. The reversal of 9898529640 is 469258989.

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

It is not an unprimeable number, because it can be changed into a prime (9898529647) 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, 562414 + ... + 579746.

It is an arithmetic number, because the mean of its divisors is an integer number (464117850).

Almost surely, 2^9898529640 is an apocalyptic number.

It is an amenable number.

9898529640 is an abundant number, since it is smaller than the sum of its proper divisors (19805012760).

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

9898529640 is a wasteful number, since it uses less digits than its factorization.

9898529640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22106 (or 22102 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 60.

The square root of 9898529640 is about 99491.3545992816. The cubic root of 9898529640 is about 2147.1228607295.

The spelling of 9898529640 in words is "nine billion, eight hundred ninety-eight million, five hundred twenty-nine thousand, six hundred forty".