90287242 has 16 divisors (see below), whose sum is σ = 137518560. Its totient is φ = 44453008.

The previous prime is 90287231. The next prime is 90287243. The reversal of 90287242 is 24278209.

It is a junction number, because it is equal to n+sod(n) for n = 90287198 and 90287207.

It is not an unprimeable number, because it can be changed into a prime (90287243) 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, 37128 + ... + 39484.

It is an arithmetic number, because the mean of its divisors is an integer number (8594910).

Almost surely, 2^90287242 is an apocalyptic number.

90287242 is a deficient number, since it is larger than the sum of its proper divisors (47231318).

90287242 is a wasteful number, since it uses less digits than its factorization.

90287242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2645.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 90287242 is about 9501.9599030937. The cubic root of 90287242 is about 448.6167267427.

The spelling of 90287242 in words is "ninety million, two hundred eighty-seven thousand, two hundred forty-two".