90785770 has 8 divisors (see below), whose sum is σ = 163414404. Its totient is φ = 36314304.

The previous prime is 90785741. The next prime is 90785777. The reversal of 90785770 is 7758709.

It can be written as a sum of positive squares in 2 ways, for example, as 87179569 + 3606201 = 9337^2 + 1899^2 .

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 (90785777) 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, 4539279 + ... + 4539298.

Almost surely, 2^90785770 is an apocalyptic number.

90785770 is a deficient number, since it is larger than the sum of its proper divisors (72628634).

90785770 is a wasteful number, since it uses less digits than its factorization.

90785770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9078584.

The product of its (nonzero) digits is 123480, while the sum is 43.

The square root of 90785770 is about 9528.1566947653. The cubic root of 90785770 is about 449.4409023507.

The spelling of 90785770 in words is "ninety million, seven hundred eighty-five thousand, seven hundred seventy".