90578638 has 8 divisors (see below), whose sum is σ = 136733832. Its totient is φ = 45000696.

The previous prime is 90578599. The next prime is 90578641. The reversal of 90578638 is 83687509.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143920 + ... + 144547.

It is an arithmetic number, because the mean of its divisors is an integer number (17091729).

Almost surely, 2^90578638 is an apocalyptic number.

90578638 is a deficient number, since it is larger than the sum of its proper divisors (46155194).

90578638 is a wasteful number, since it uses less digits than its factorization.

90578638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288626.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 90578638 is about 9517.2810192828. The cubic root of 90578638 is about 449.0988352257.

The spelling of 90578638 in words is "ninety million, five hundred seventy-eight thousand, six hundred thirty-eight".