90238357608 has 128 divisors (see below), whose sum is σ = 264359040000. Its totient is φ = 25131326976.

The previous prime is 90238357571. The next prime is 90238357621. The reversal of 90238357608 is 80675383209.

It is a Cunningham number, because it is equal to 300397²-1.

It is a super-2 number, since 2×90238357608² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3592260 + ... + 3617292.

It is an arithmetic number, because the mean of its divisors is an integer number (2065305000).

Almost surely, 2^90238357608 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 90238357608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132179520000).

90238357608 is an abundant number, since it is smaller than the sum of its proper divisors (174120682392).

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

90238357608 is a wasteful number, since it uses less digits than its factorization.

90238357608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25591 (or 25587 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 51.

The spelling of 90238357608 in words is "ninety billion, two hundred thirty-eight million, three hundred fifty-seven thousand, six hundred eight".