90468778 has 4 divisors (see below), whose sum is σ = 135703170. Its totient is φ = 45234388.

The previous prime is 90468773. The next prime is 90468779. The reversal of 90468778 is 87786409.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 77915929 + 12552849 = 8827^2 + 3543^2 .

It is not an unprimeable number, because it can be changed into a prime (90468773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22617193 + ... + 22617196.

Almost surely, 2^90468778 is an apocalyptic number.

90468778 is a deficient number, since it is larger than the sum of its proper divisors (45234392).

90468778 is a wasteful number, since it uses less digits than its factorization.

90468778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45234391.

The product of its (nonzero) digits is 677376, while the sum is 49.

The square root of 90468778 is about 9511.5076617748. The cubic root of 90468778 is about 448.9171957891.

The spelling of 90468778 in words is "ninety million, four hundred sixty-eight thousand, seven hundred seventy-eight".