90442688 has 28 divisors (see below), whose sum is σ = 205112112. Its totient is φ = 38760960.

The previous prime is 90442673. The next prime is 90442699. The reversal of 90442688 is 88624409.

It is a tau number, because it is divible by the number of its divisors (28).

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, 100493 + ... + 101388.

Almost surely, 2^90442688 is an apocalyptic number.

It is an amenable number.

90442688 is an abundant number, since it is smaller than the sum of its proper divisors (114669424).

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

90442688 is a wasteful number, since it uses less digits than its factorization.

90442688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201900 (or 201890 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 90442688 is about 9510.1360663242. The cubic root of 90442688 is about 448.8740377112.

The spelling of 90442688 in words is "ninety million, four hundred forty-two thousand, six hundred eighty-eight".