90729168 has 40 divisors (see below), whose sum is σ = 242469600. Its totient is φ = 29199744.

The previous prime is 90729167. The next prime is 90729179. The reversal of 90729168 is 86192709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90729167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31198 + ... + 33981.

It is an arithmetic number, because the mean of its divisors is an integer number (6061740).

Almost surely, 2^90729168 is an apocalyptic number.

It is an amenable number.

90729168 is an abundant number, since it is smaller than the sum of its proper divisors (151740432).

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

90729168 is a wasteful number, since it uses less digits than its factorization.

90729168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65219 (or 65213 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 90729168 is about 9525.1859824362. The cubic root of 90729168 is about 449.3474789627.

The spelling of 90729168 in words is "ninety million, seven hundred twenty-nine thousand, one hundred sixty-eight".