90240758 has 4 divisors (see below), whose sum is σ = 135361140. Its totient is φ = 45120378.

The previous prime is 90240757. The next prime is 90240797. The reversal of 90240758 is 85704209.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90240757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22560188 + ... + 22560191.

It is an arithmetic number, because the mean of its divisors is an integer number (33840285).

Almost surely, 2^90240758 is an apocalyptic number.

90240758 is a deficient number, since it is larger than the sum of its proper divisors (45120382).

90240758 is a wasteful number, since it uses less digits than its factorization.

90240758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45120381.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 90240758 is about 9499.5135664938. The cubic root of 90240758 is about 448.5397240593.

The spelling of 90240758 in words is "ninety million, two hundred forty thousand, seven hundred fifty-eight".