99944025390 has 256 divisors, whose sum is σ = 293820825600. Its totient is φ = 23974185600.

The previous prime is 99944025347. The next prime is 99944025409. The reversal of 99944025390 is 9352044999.

99944025390 is a `hidden beast` number, since 9 + 99 + 440 + 25 + 3 + 90 = 666.

It is a super-2 number, since 2×99944025390² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 208651171 + ... + 208651649.

It is an arithmetic number, because the mean of its divisors is an integer number (1147737600).

Almost surely, 2^99944025390 is an apocalyptic number.

99944025390 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

99944025390 is the 158070-th decagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99944025390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146910412800).

99944025390 is an abundant number, since it is smaller than the sum of its proper divisors (193876800210).

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

99944025390 is a wasteful number, since it uses less digits than its factorization.

99944025390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100 (or 1094 counting only the distinct ones).

The product of its (nonzero) digits is 3149280, while the sum is 54.

The spelling of 99944025390 in words is "ninety-nine billion, nine hundred forty-four million, twenty-five thousand, three hundred ninety".