99942397380 has 144 divisors (see below), whose sum is σ = 346701124224. Its totient is φ = 22828538880.

The previous prime is 99942397343. The next prime is 99942397381. The reversal of 99942397380 is 8379324999.

99942397380 is a `hidden beast` number, since 9 + 99 + 423 + 97 + 38 + 0 = 666.

99942397380 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (99942397381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1892940 + ... + 1945020.

It is an arithmetic number, because the mean of its divisors is an integer number (2407646696).

Almost surely, 2^99942397380 is an apocalyptic number.

99942397380 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 99942397380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173350562112).

99942397380 is an abundant number, since it is smaller than the sum of its proper divisors (246758726844).

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

99942397380 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (99942397379) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (53626).

99942397380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53626 (or 53621 counting only the distinct ones).

The product of its (nonzero) digits is 26453952, while the sum is 63.

The spelling of 99942397380 in words is "ninety-nine billion, nine hundred forty-two million, three hundred ninety-seven thousand, three hundred eighty".