97899838920 has 512 divisors, whose sum is σ = 371279462400. Its totient is φ = 22774348800.

The previous prime is 97899838853. The next prime is 97899838931. The reversal of 97899838920 is 2983899879.

It is a super-3 number, since 3×97899838920³ (a number of 34 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 18712705 + ... + 18717935.

It is an arithmetic number, because the mean of its divisors is an integer number (725155200).

Almost surely, 2^97899838920 is an apocalyptic number.

97899838920 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 97899838920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185639731200).

97899838920 is an abundant number, since it is smaller than the sum of its proper divisors (273379623480).

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

97899838920 is a wasteful number, since it uses less digits than its factorization.

97899838920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5338 (or 5328 counting only the distinct ones).

The product of its (nonzero) digits is 141087744, while the sum is 72.

The spelling of 97899838920 in words is "ninety-seven billion, eight hundred ninety-nine million, eight hundred thirty-eight thousand, nine hundred twenty".