90699312 has 80 divisors (see below), whose sum is σ = 269089920. Its totient is φ = 26035200.

The previous prime is 90699311. The next prime is 90699319. The reversal of 90699312 is 21399609.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (90699311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5512 + ... + 14552.

It is an arithmetic number, because the mean of its divisors is an integer number (3363624).

Almost surely, 2^90699312 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 90699312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134544960).

90699312 is an abundant number, since it is smaller than the sum of its proper divisors (178390608).

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

90699312 is a wasteful number, since it uses less digits than its factorization.

90699312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9082 (or 9076 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 39.

The square root of 90699312 is about 9523.6186399918. The cubic root of 90699312 is about 449.2981850386.

It can be divided in two parts, 9069 and 9312, that added together give a palindrome (18381).

The spelling of 90699312 in words is "ninety million, six hundred ninety-nine thousand, three hundred twelve".