90038890 has 8 divisors (see below), whose sum is σ = 162070020. Its totient is φ = 36015552.

The previous prime is 90038833. The next prime is 90038899. The reversal of 90038890 is 9883009.

It can be written as a sum of positive squares in 2 ways, for example, as 90003169 + 35721 = 9487^2 + 189^2 .

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

It is not an unprimeable number, because it can be changed into a prime (90038899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4501935 + ... + 4501954.

Almost surely, 2^90038890 is an apocalyptic number.

90038890 is a deficient number, since it is larger than the sum of its proper divisors (72031130).

90038890 is a wasteful number, since it uses less digits than its factorization.

90038890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9003896.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 90038890 is about 9488.8824421003. The cubic root of 90038890 is about 448.2050141867.

The spelling of 90038890 in words is "ninety million, thirty-eight thousand, eight hundred ninety".