90287240 has 32 divisors (see below), whose sum is σ = 213840000. Its totient is φ = 34213824.

The previous prime is 90287231. The next prime is 90287243. The reversal of 90287240 is 4278209.

It is a junction number, because it is equal to n+sod(n) for n = 90287197 and 90287206.

It is not an unprimeable number, because it can be changed into a prime (90287243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58640 + ... + 60159.

It is an arithmetic number, because the mean of its divisors is an integer number (6682500).

Almost surely, 2^90287240 is an apocalyptic number.

It is an amenable number.

90287240 is an abundant number, since it is smaller than the sum of its proper divisors (123552760).

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

90287240 is a wasteful number, since it uses less digits than its factorization.

90287240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118829 (or 118825 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 90287240 is about 9501.9597978522. The cubic root of 90287240 is about 448.6167234302.

The spelling of 90287240 in words is "ninety million, two hundred eighty-seven thousand, two hundred forty".