90444578 has 16 divisors (see below), whose sum is σ = 157591104. Its totient is φ = 38126160.

The previous prime is 90444551. The next prime is 90444589. The reversal of 90444578 is 87544409.

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, 52100 + ... + 53807.

It is an arithmetic number, because the mean of its divisors is an integer number (9849444).

Almost surely, 2^90444578 is an apocalyptic number.

90444578 is a deficient number, since it is larger than the sum of its proper divisors (67146526).

90444578 is a wasteful number, since it uses less digits than its factorization.

90444578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105977.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 90444578 is about 9510.2354334685. The cubic root of 90444578 is about 448.8771644280.

The spelling of 90444578 in words is "ninety million, four hundred forty-four thousand, five hundred seventy-eight".