90543312 has 80 divisors (see below), whose sum is σ = 268316160. Its totient is φ = 29203200.

The previous prime is 90543223. The next prime is 90543317. The reversal of 90543312 is 21334509.

90543312 is a `hidden beast` number, since 90 + 543 + 31 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90543317) 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, 10012 + ... + 16772.

It is an arithmetic number, because the mean of its divisors is an integer number (3353952).

Almost surely, 2^90543312 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 90543312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134158080).

90543312 is an abundant number, since it is smaller than the sum of its proper divisors (177772848).

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

90543312 is a wasteful number, since it uses less digits than its factorization.

90543312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6809 (or 6797 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 90543312 is about 9515.4249510991. The cubic root of 90543312 is about 449.0404442382.

The spelling of 90543312 in words is "ninety million, five hundred forty-three thousand, three hundred twelve".