90445474 has 36 divisors (see below), whose sum is σ = 167821794. Its totient is φ = 36325632.

The previous prime is 90445451. The next prime is 90445477. The reversal of 90445474 is 47454409.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 64689849 + 25755625 = 8043^2 + 5075^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90445477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 388062 + ... + 388294.

Almost surely, 2^90445474 is an apocalyptic number.

90445474 is a deficient number, since it is larger than the sum of its proper divisors (77376320).

90445474 is a wasteful number, since it uses less digits than its factorization.

90445474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499 (or 259 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 90445474 is about 9510.2825404927. The cubic root of 90445474 is about 448.8786467081.

The spelling of 90445474 in words is "ninety million, four hundred forty-five thousand, four hundred seventy-four".