90172950 has 96 divisors (see below), whose sum is σ = 257673984. Its totient is φ = 20442240.

The previous prime is 90172939. The next prime is 90172967. The reversal of 90172950 is 5927109.

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 47 ways as a sum of consecutive naturals, for example, 164577 + ... + 165123.

It is an arithmetic number, because the mean of its divisors is an integer number (2684104).

Almost surely, 2^90172950 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90172950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128836992).

90172950 is an abundant number, since it is smaller than the sum of its proper divisors (167501034).

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

90172950 is a wasteful number, since it uses less digits than its factorization.

90172950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726 (or 721 counting only the distinct ones).

The product of its (nonzero) digits is 5670, while the sum is 33.

The square root of 90172950 is about 9495.9438709377. The cubic root of 90172950 is about 448.4273498453.

The spelling of 90172950 in words is "ninety million, one hundred seventy-two thousand, nine hundred fifty".