90939800 has 96 divisors (see below), whose sum is σ = 255921120. Its totient is φ = 29337600.

The previous prime is 90939799. The next prime is 90939803. The reversal of 90939800 is 893909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90939803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21890 + ... + 25710.

It is an arithmetic number, because the mean of its divisors is an integer number (2665845).

Almost surely, 2^90939800 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 90939800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127960560).

90939800 is an abundant number, since it is smaller than the sum of its proper divisors (164981320).

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

90939800 is a wasteful number, since it uses less digits than its factorization.

90939800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3861 (or 3852 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 90939800 is about 9536.2361547940. The cubic root of 90939800 is about 449.6949372724.

The spelling of 90939800 in words is "ninety million, nine hundred thirty-nine thousand, eight hundred".