90173272 has 16 divisors (see below), whose sum is σ = 193228560. Its totient is φ = 38645664.

The previous prime is 90173243. The next prime is 90173273. The reversal of 90173272 is 27237109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90173273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 805063 + ... + 805174.

It is an arithmetic number, because the mean of its divisors is an integer number (12076785).

Almost surely, 2^90173272 is an apocalyptic number.

It is an amenable number.

90173272 is an abundant number, since it is smaller than the sum of its proper divisors (103055288).

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

90173272 is a wasteful number, since it uses less digits than its factorization.

90173272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1610250 (or 1610246 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 90173272 is about 9495.9608255300. The cubic root of 90173272 is about 448.4278836101.

The spelling of 90173272 in words is "ninety million, one hundred seventy-three thousand, two hundred seventy-two".