90128795 has 8 divisors (see below), whose sum is σ = 108640896. Its totient is φ = 71778816.

The previous prime is 90128791. The next prime is 90128893. The reversal of 90128795 is 59782109.

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

It is a cyclic number.

It is not a de Polignac number, because 90128795 - 2² = 90128791 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90128791) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39302 + ... + 41531.

It is an arithmetic number, because the mean of its divisors is an integer number (13580112).

Almost surely, 2^90128795 is an apocalyptic number.

90128795 is a deficient number, since it is larger than the sum of its proper divisors (18512101).

90128795 is a wasteful number, since it uses less digits than its factorization.

90128795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81061.

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 90128795 is about 9493.6186462276. The cubic root of 90128795 is about 448.3541440691.

The spelling of 90128795 in words is "ninety million, one hundred twenty-eight thousand, seven hundred ninety-five".