90191884828 has 24 divisors (see below), whose sum is σ = 161838184032. Its totient is φ = 43963243584.

The previous prime is 90191884819. The next prime is 90191884873. The reversal of 90191884828 is 82848819109.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1321600 + ... + 1388167.

It is an arithmetic number, because the mean of its divisors is an integer number (6743257668).

Almost surely, 2^90191884828 is an apocalyptic number.

It is an amenable number.

90191884828 is a deficient number, since it is larger than the sum of its proper divisors (71646299204).

90191884828 is a wasteful number, since it uses less digits than its factorization.

90191884828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2709981 (or 2709979 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 58.

It can be divided in two parts, 9019188 and 4828, that added together give a square (9024016 = 3004²).

The spelling of 90191884828 in words is "ninety billion, one hundred ninety-one million, eight hundred eighty-four thousand, eight hundred twenty-eight".