90667578 has 8 divisors (see below), whose sum is σ = 181335168. Its totient is φ = 30222524.

The previous prime is 90667571. The next prime is 90667597. The reversal of 90667578 is 87576609.

It is a sphenic number, since it is the product of 3 distinct primes.

90667578 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (90667571) 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, 7555626 + ... + 7555637.

It is an arithmetic number, because the mean of its divisors is an integer number (22666896).

Almost surely, 2^90667578 is an apocalyptic number.

90667578 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

90667578 is a wasteful number, since it uses less digits than its factorization.

90667578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15111268.

The product of its (nonzero) digits is 635040, while the sum is 48.

The square root of 90667578 is about 9521.9524258421. The cubic root of 90667578 is about 449.2457785705.

The spelling of 90667578 in words is "ninety million, six hundred sixty-seven thousand, five hundred seventy-eight".