90173628 has 24 divisors (see below), whose sum is σ = 233783760. Its totient is φ = 30057840.

The previous prime is 90173597. The next prime is 90173651. The reversal of 90173628 is 82637109.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 90173592 and 90173601.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 417363 + ... + 417578.

It is an arithmetic number, because the mean of its divisors is an integer number (9740990).

Almost surely, 2^90173628 is an apocalyptic number.

It is an amenable number.

90173628 is an abundant number, since it is smaller than the sum of its proper divisors (143610132).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90173628 is a wasteful number, since it uses less digits than its factorization.

90173628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834954 (or 834946 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 90173628 is about 9495.9795703234. The cubic root of 90173628 is about 448.4284737337.

It can be divided in two parts, 901 and 73628, that added together give a square (74529 = 273²).

The spelling of 90173628 in words is "ninety million, one hundred seventy-three thousand, six hundred twenty-eight".