90889906 has 8 divisors (see below), whose sum is σ = 136568880. Its totient is φ = 45366948.

The previous prime is 90889889. The next prime is 90889921. The reversal of 90889906 is 60998809.

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

It is a super-3 number, since 3×90889906³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 90889906.

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, 37536 + ... + 39883.

It is an arithmetic number, because the mean of its divisors is an integer number (17071110).

Almost surely, 2^90889906 is an apocalyptic number.

90889906 is a deficient number, since it is larger than the sum of its proper divisors (45678974).

90889906 is a wasteful number, since it uses less digits than its factorization.

90889906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78008.

The product of its (nonzero) digits is 279936, while the sum is 49.

The square root of 90889906 is about 9533.6197742515. The cubic root of 90889906 is about 449.6126807180.

The spelling of 90889906 in words is "ninety million, eight hundred eighty-nine thousand, nine hundred six".