90012770 has 8 divisors (see below), whose sum is σ = 162023004. Its totient is φ = 36005104.

The previous prime is 90012763. The next prime is 90012821. The reversal of 90012770 is 7721009.

It can be written as a sum of positive squares in 2 ways, for example, as 87030241 + 2982529 = 9329^2 + 1727^2 .

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

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, 4500629 + ... + 4500648.

Almost surely, 2^90012770 is an apocalyptic number.

90012770 is a deficient number, since it is larger than the sum of its proper divisors (72010234).

90012770 is a wasteful number, since it uses less digits than its factorization.

90012770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9001284.

The product of its (nonzero) digits is 882, while the sum is 26.

The square root of 90012770 is about 9487.5059947280. The cubic root of 90012770 is about 448.1616690380.

Adding to 90012770 its reverse (7721009), we get a palindrome (97733779).

The spelling of 90012770 in words is "ninety million, twelve thousand, seven hundred seventy".