99438930 has 24 divisors (see below), whose sum is σ = 258541452. Its totient is φ = 26517024.

The previous prime is 99438923. The next prime is 99438931. The reversal of 99438930 is 3983499.

It can be written as a sum of positive squares in 2 ways, for example, as 97476129 + 1962801 = 9873^2 + 1401^2 .

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

It is not an unprimeable number, because it can be changed into a prime (99438931) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 552349 + ... + 552528.

Almost surely, 2^99438930 is an apocalyptic number.

99438930 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

99438930 is an abundant number, since it is smaller than the sum of its proper divisors (159102522).

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

99438930 is a wasteful number, since it uses less digits than its factorization.

99438930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104890 (or 1104887 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 99438930 is about 9971.9070392779. The cubic root of 99438930 is about 463.2891693438.

The spelling of 99438930 in words is "ninety-nine million, four hundred thirty-eight thousand, nine hundred thirty".