90109340 has 48 divisors (see below), whose sum is σ = 194527872. Its totient is φ = 35045376.

The previous prime is 90109339. The next prime is 90109363. The reversal of 90109340 is 4390109.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 241394 + ... + 241766.

It is an arithmetic number, because the mean of its divisors is an integer number (4052664).

Almost surely, 2^90109340 is an apocalyptic number.

It is an amenable number.

90109340 is an abundant number, since it is smaller than the sum of its proper divisors (104418532).

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

90109340 is a wasteful number, since it uses less digits than its factorization.

90109340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686 (or 684 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 90109340 is about 9492.5939552896. The cubic root of 90109340 is about 448.3218815069.

Adding to 90109340 its reverse (4390109), we get a palindrome (94499449).

The spelling of 90109340 in words is "ninety million, one hundred nine thousand, three hundred forty".