90887775 has 48 divisors (see below), whose sum is σ = 167989248. Its totient is φ = 42976000.

The previous prime is 90887761. The next prime is 90887777. The reversal of 90887775 is 57778809.

It is not a de Polignac number, because 90887775 - 2¹³ = 90879583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90887777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 32482 + ... + 35168.

It is an arithmetic number, because the mean of its divisors is an integer number (3499776).

Almost surely, 2^90887775 is an apocalyptic number.

90887775 is a deficient number, since it is larger than the sum of its proper divisors (77101473).

90887775 is a wasteful number, since it uses less digits than its factorization.

90887775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2752 (or 2747 counting only the distinct ones).

The product of its (nonzero) digits is 987840, while the sum is 51.

The square root of 90887775 is about 9533.5080112202. The cubic root of 90887775 is about 449.6091668254.

The spelling of 90887775 in words is "ninety million, eight hundred eighty-seven thousand, seven hundred seventy-five".