90109650 has 48 divisors (see below), whose sum is σ = 226646208. Its totient is φ = 23688000.

The previous prime is 90109637. The next prime is 90109651. The reversal of 90109650 is 5690109.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (90109651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6420 + ... + 14880.

It is an arithmetic number, because the mean of its divisors is an integer number (4721796).

Almost surely, 2^90109650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90109650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113323104).

90109650 is an abundant number, since it is smaller than the sum of its proper divisors (136536558).

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

90109650 is a wasteful number, since it uses less digits than its factorization.

90109650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8547 (or 8542 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 90109650 is about 9492.6102837944. The cubic root of 90109650 is about 448.3223956217.

Adding to 90109650 its reverse (5690109), we get a palindrome (95799759).

The spelling of 90109650 in words is "ninety million, one hundred nine thousand, six hundred fifty".