99032220 has 288 divisors, whose sum is σ = 369847296. Its totient is φ = 21772800.

The previous prime is 99032203. The next prime is 99032233. The reversal of 99032220 is 2223099.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1394785 + ... + 1394855.

It is an arithmetic number, because the mean of its divisors is an integer number (1284192).

Almost surely, 2^99032220 is an apocalyptic number.

99032220 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 99032220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184923648).

99032220 is an abundant number, since it is smaller than the sum of its proper divisors (270815076).

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

99032220 is a wasteful number, since it uses less digits than its factorization.

99032220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143 (or 129 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 99032220 is about 9951.4933552709. The cubic root of 99032220 is about 462.6566812710.

The spelling of 99032220 in words is "ninety-nine million, thirty-two thousand, two hundred twenty".