90243672 has 32 divisors (see below), whose sum is σ = 225844080. Its totient is φ = 30049920.

The previous prime is 90243649. The next prime is 90243689. The reversal of 90243672 is 27634209.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39522 + ... + 41742.

Almost surely, 2^90243672 is an apocalyptic number.

It is an amenable number.

90243672 is an abundant number, since it is smaller than the sum of its proper divisors (135600408).

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

90243672 is a wasteful number, since it uses less digits than its factorization.

90243672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3923 (or 3919 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 90243672 is about 9499.6669415301. Note that the first 3 decimals coincide. The cubic root of 90243672 is about 448.5445519986.

The spelling of 90243672 in words is "ninety million, two hundred forty-three thousand, six hundred seventy-two".