99091080 has 256 divisors, whose sum is σ = 380160000. Its totient is φ = 22705920.

The previous prime is 99091063. The next prime is 99091117. The reversal of 99091080 is 8019099.

99091080 = T₄₃₉ + T₄₄₀ + ... + T₈₇₈.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 225501 + ... + 225939.

It is an arithmetic number, because the mean of its divisors is an integer number (1485000).

Almost surely, 2^99091080 is an apocalyptic number.

99091080 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 99091080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190080000).

99091080 is an abundant number, since it is smaller than the sum of its proper divisors (281068920).

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

99091080 is a wasteful number, since it uses less digits than its factorization.

99091080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489 (or 479 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 99091080 is about 9954.4502610641. The cubic root of 99091080 is about 462.7483234285.

The spelling of 99091080 in words is "ninety-nine million, ninety-one thousand, eighty".