90489868 has 72 divisors (see below), whose sum is σ = 194431104. Its totient is φ = 36691200.

The previous prime is 90489859. The next prime is 90489871. The reversal of 90489868 is 86898409.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 321888 + ... + 322168.

It is an arithmetic number, because the mean of its divisors is an integer number (2700432).

Almost surely, 2^90489868 is an apocalyptic number.

90489868 is a gapful number since it is divisible by the number (98) 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 90489868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97215552).

90489868 is an abundant number, since it is smaller than the sum of its proper divisors (103941236).

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

90489868 is a wasteful number, since it uses less digits than its factorization.

90489868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383 (or 374 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 52.

The square root of 90489868 is about 9512.6162542173. The cubic root of 90489868 is about 448.9520768028.

The spelling of 90489868 in words is "ninety million, four hundred eighty-nine thousand, eight hundred sixty-eight".