90909108 has 24 divisors (see below), whose sum is σ = 235690560. Its totient is φ = 30303000.

The previous prime is 90909101. The next prime is 90909109. The reversal of 90909108 is 80190909.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90909101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 420768 + ... + 420983.

It is an arithmetic number, because the mean of its divisors is an integer number (9820440).

Almost surely, 2^90909108 is an apocalyptic number.

It is an amenable number.

90909108 is an abundant number, since it is smaller than the sum of its proper divisors (144781452).

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

90909108 is a wasteful number, since it uses less digits than its factorization.

90909108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841764 (or 841756 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 90909108 is about 9534.6267887107. The cubic root of 90909108 is about 449.6443412003.

The spelling of 90909108 in words is "ninety million, nine hundred nine thousand, one hundred eight".