90843638400 has 480 divisors, whose sum is σ = 340301522880. Its totient is φ = 23858841600.

The previous prime is 90843638399. The next prime is 90843638423. The reversal of 90843638400 is 483634809.

90843638400 is a `hidden beast` number, since 9 + 0 + 8 + 4 + 3 + 638 + 4 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (480).

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

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 59 ways as a sum of consecutive naturals, for example, 17363785 + ... + 17369015.

It is an arithmetic number, because the mean of its divisors is an integer number (708961506).

Almost surely, 2^90843638400 is an apocalyptic number.

90843638400 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 90843638400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170150761440).

90843638400 is an abundant number, since it is smaller than the sum of its proper divisors (249457884480).

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

90843638400 is a wasteful number, since it uses less digits than its factorization.

90843638400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5334 (or 5308 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The spelling of 90843638400 in words is "ninety billion, eight hundred forty-three million, six hundred thirty-eight thousand, four hundred".