90217608 has 128 divisors (see below), whose sum is σ = 257040000. Its totient is φ = 26347776.

The previous prime is 90217601. The next prime is 90217619. The reversal of 90217608 is 80671209.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90217601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1529083 + ... + 1529141.

It is an arithmetic number, because the mean of its divisors is an integer number (2008125).

Almost surely, 2^90217608 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 90217608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128520000).

90217608 is an abundant number, since it is smaller than the sum of its proper divisors (166822392).

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

90217608 is a wasteful number, since it uses less digits than its factorization.

90217608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 90217608 is about 9498.2950048943. The cubic root of 90217608 is about 448.5013652552.

The spelling of 90217608 in words is "ninety million, two hundred seventeen thousand, six hundred eight".