99869220 has 384 divisors, whose sum is σ = 383201280. Its totient is φ = 21288960.

The previous prime is 99869213. The next prime is 99869227. The reversal of 99869220 is 2296899.

It is an interprime number because it is at equal distance from previous prime (99869213) and next prime (99869227).

It is a super-2 number, since 2×99869220² = 19947722206816800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99869227) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2322519 + ... + 2322561.

It is an arithmetic number, because the mean of its divisors is an integer number (997920).

Almost surely, 2^99869220 is an apocalyptic number.

99869220 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 99869220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191600640).

99869220 is an abundant number, since it is smaller than the sum of its proper divisors (283332060).

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

99869220 is a wasteful number, since it uses less digits than its factorization.

99869220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 99869220 is about 9993.4588606748. The cubic root of 99869220 is about 463.9564527601.

The spelling of 99869220 in words is "ninety-nine million, eight hundred sixty-nine thousand, two hundred twenty".