90778375 has 16 divisors (see below), whose sum is σ = 115932960. Its totient is φ = 70929600.

The previous prime is 90778357. The next prime is 90778379. The reversal of 90778375 is 57387709.

It is a happy number.

It is not a de Polignac number, because 90778375 - 2⁵ = 90778343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90778379) 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 in 15 ways as a sum of consecutive naturals, for example, 3070 + ... + 13819.

It is an arithmetic number, because the mean of its divisors is an integer number (7245810).

Almost surely, 2^90778375 is an apocalyptic number.

90778375 is a deficient number, since it is larger than the sum of its proper divisors (25154585).

90778375 is a wasteful number, since it uses less digits than its factorization.

90778375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16947 (or 16937 counting only the distinct ones).

The product of its (nonzero) digits is 370440, while the sum is 46.

The square root of 90778375 is about 9527.7686264938. The cubic root of 90778375 is about 449.4286988753.

The spelling of 90778375 in words is "ninety million, seven hundred seventy-eight thousand, three hundred seventy-five".