90173406 has 32 divisors (see below), whose sum is σ = 192868128. Its totient is φ = 28006400.

The previous prime is 90173399. The next prime is 90173437. The reversal of 90173406 is 60437109.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5926 + ... + 14678.

It is an arithmetic number, because the mean of its divisors is an integer number (6027129).

Almost surely, 2^90173406 is an apocalyptic number.

90173406 is an abundant number, since it is smaller than the sum of its proper divisors (102694722).

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

90173406 is a wasteful number, since it uses less digits than its factorization.

90173406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8876.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 90173406 is about 9495.9678811588. The cubic root of 90173406 is about 448.4281057355.

The spelling of 90173406 in words is "ninety million, one hundred seventy-three thousand, four hundred six".