90105844 has 6 divisors (see below), whose sum is σ = 157685234. Its totient is φ = 45052920.

The previous prime is 90105833. The next prime is 90105853. The reversal of 90105844 is 44850109.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 69056100 + 21049744 = 8310^2 + 4588^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11263227 + ... + 11263234.

Almost surely, 2^90105844 is an apocalyptic number.

It is an amenable number.

90105844 is a deficient number, since it is larger than the sum of its proper divisors (67579390).

90105844 is a wasteful number, since it uses less digits than its factorization.

90105844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22526465 (or 22526463 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 90105844 is about 9492.4098099482. The cubic root of 90105844 is about 448.3160835376.

The spelling of 90105844 in words is "ninety million, one hundred five thousand, eight hundred forty-four".