90240518 has 16 divisors (see below), whose sum is σ = 140676480. Its totient is φ = 43362816.

The previous prime is 90240511. The next prime is 90240583. The reversal of 90240518 is 81504209.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90240511) 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, 9446 + ... + 16422.

It is an arithmetic number, because the mean of its divisors is an integer number (8792280).

Almost surely, 2^90240518 is an apocalyptic number.

90240518 is a deficient number, since it is larger than the sum of its proper divisors (50435962).

90240518 is a wasteful number, since it uses less digits than its factorization.

90240518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7231.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 90240518 is about 9499.5009342597. The cubic root of 90240518 is about 448.5393264207.

The spelling of 90240518 in words is "ninety million, two hundred forty thousand, five hundred eighteen".