99939940 has 24 divisors (see below), whose sum is σ = 222220152. Its totient is φ = 37624320.

The previous prime is 99939937. The next prime is 99939953. The reversal of 99939940 is 4993999.

It can be written as a sum of positive squares in 4 ways, for example, as 30184036 + 69755904 = 5494^2 + 8352^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146631 + ... + 147310.

It is an arithmetic number, because the mean of its divisors is an integer number (9259173).

Almost surely, 2^99939940 is an apocalyptic number.

It is an amenable number.

99939940 is an abundant number, since it is smaller than the sum of its proper divisors (122280212).

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

99939940 is a wasteful number, since it uses less digits than its factorization.

99939940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293967 (or 293965 counting only the distinct ones).

The product of its (nonzero) digits is 708588, while the sum is 52.

The square root of 99939940 is about 9996.9965489641. The cubic root of 99939940 is about 464.0659401431.

The spelling of 99939940 in words is "ninety-nine million, nine hundred thirty-nine thousand, nine hundred forty".