99899440 has 60 divisors (see below), whose sum is σ = 238672224. Its totient is φ = 38869632.

The previous prime is 99899413. The next prime is 99899467. The reversal of 99899440 is 4499899.

It is an interprime number because it is at equal distance from previous prime (99899413) and next prime (99899467).

It is a super-2 number, since 2×99899440² = 19959796224627200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 612799 + ... + 612961.

Almost surely, 2^99899440 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 99899440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119336112).

99899440 is an abundant number, since it is smaller than the sum of its proper divisors (138772784).

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

99899440 is a wasteful number, since it uses less digits than its factorization.

99899440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386 (or 217 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 52.

The square root of 99899440 is about 9994.9707353248. The cubic root of 99899440 is about 464.0032451220.

The spelling of 99899440 in words is "ninety-nine million, eight hundred ninety-nine thousand, four hundred forty".