99901648 has 80 divisors (see below), whose sum is σ = 243555840. Its totient is φ = 38563200.

The previous prime is 99901621. The next prime is 99901651. The reversal of 99901648 is 84610999.

It is a junction number, because it is equal to n+sod(n) for n = 99901598 and 99901607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161083 + ... + 161701.

It is an arithmetic number, because the mean of its divisors is an integer number (3044448).

Almost surely, 2^99901648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99901648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121777920).

99901648 is an abundant number, since it is smaller than the sum of its proper divisors (143654192).

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

99901648 is a wasteful number, since it uses less digits than its factorization.

99901648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776 (or 770 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 46.

The square root of 99901648 is about 9995.0811902655. The cubic root of 99901648 is about 464.0066635983.

The spelling of 99901648 in words is "ninety-nine million, nine hundred one thousand, six hundred forty-eight".