90661842 has 48 divisors (see below), whose sum is σ = 205837632. Its totient is φ = 29905200.

The previous prime is 90661829. The next prime is 90661933. The reversal of 90661842 is 24816609.

It is a junction number, because it is equal to n+sod(n) for n = 90661797 and 90661806.

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, 48163 + ... + 50009.

It is an arithmetic number, because the mean of its divisors is an integer number (4288284).

Almost surely, 2^90661842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90661842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102918816).

90661842 is an abundant number, since it is smaller than the sum of its proper divisors (115175790).

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

90661842 is a wasteful number, since it uses less digits than its factorization.

90661842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1965 (or 1953 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 90661842 is about 9521.6512223458. The cubic root of 90661842 is about 449.2363046653.

The spelling of 90661842 in words is "ninety million, six hundred sixty-one thousand, eight hundred forty-two".