90220750 has 32 divisors (see below), whose sum is σ = 169457184. Its totient is φ = 35968000.

The previous prime is 90220747. The next prime is 90220771. The reversal of 90220750 is 5702209.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140430 + ... + 141070.

It is an arithmetic number, because the mean of its divisors is an integer number (5295537).

Almost surely, 2^90220750 is an apocalyptic number.

90220750 is a deficient number, since it is larger than the sum of its proper divisors (79236434).

90220750 is a wasteful number, since it uses less digits than its factorization.

90220750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221 (or 1211 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 90220750 is about 9498.4604015598. The cubic root of 90220750 is about 448.5065718328.

Adding to 90220750 its reverse (5702209), we get a palindrome (95922959).

The spelling of 90220750 in words is "ninety million, two hundred twenty thousand, seven hundred fifty".