90717828 has 12 divisors (see below), whose sum is σ = 211674960. Its totient is φ = 30239272.

The previous prime is 90717827. The next prime is 90717839. The reversal of 90717828 is 82871709.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 90717828.

It is not an unprimeable number, because it can be changed into a prime (90717827) 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, 3779898 + ... + 3779921.

It is an arithmetic number, because the mean of its divisors is an integer number (17639580).

Almost surely, 2^90717828 is an apocalyptic number.

It is an amenable number.

90717828 is an abundant number, since it is smaller than the sum of its proper divisors (120957132).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90717828 is a wasteful number, since it uses less digits than its factorization.

90717828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7559826 (or 7559824 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 42.

The square root of 90717828 is about 9524.5906998674. The cubic root of 90717828 is about 449.3287572630.

The spelling of 90717828 in words is "ninety million, seven hundred seventeen thousand, eight hundred twenty-eight".