99623940 has 96 divisors (see below), whose sum is σ = 302090880. Its totient is φ = 24385536.

The previous prime is 99623939. The next prime is 99623963. The reversal of 99623940 is 4932699.

It is a super-2 number, since 2×99623940² = 19849858842247200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 99623892 and 99623901.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 262671 + ... + 263049.

It is an arithmetic number, because the mean of its divisors is an integer number (3146780).

Almost surely, 2^99623940 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 99623940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151045440).

99623940 is an abundant number, since it is smaller than the sum of its proper divisors (202466940).

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

99623940 is a wasteful number, since it uses less digits than its factorization.

99623940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741 (or 739 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 42.

The square root of 99623940 is about 9981.1792890420. The cubic root of 99623940 is about 463.5763138473.

The spelling of 99623940 in words is "ninety-nine million, six hundred twenty-three thousand, nine hundred forty".