90189506 has 8 divisors (see below), whose sum is σ = 147582864. Its totient is φ = 40995220.

The previous prime is 90189503. The next prime is 90189511. The reversal of 90189506 is 60598109.

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

It is a self number, because there is not a number n which added to its sum of digits gives 90189506.

It is not an unprimeable number, because it can be changed into a prime (90189503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2049740 + ... + 2049783.

It is an arithmetic number, because the mean of its divisors is an integer number (18447858).

Almost surely, 2^90189506 is an apocalyptic number.

90189506 is a deficient number, since it is larger than the sum of its proper divisors (57393358).

90189506 is a wasteful number, since it uses less digits than its factorization.

90189506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4099536.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 90189506 is about 9496.8155715482. The cubic root of 90189506 is about 448.4547923281.

The spelling of 90189506 in words is "ninety million, one hundred eighty-nine thousand, five hundred six".