91005028 has 48 divisors (see below), whose sum is σ = 169646400. Its totient is φ = 42666624.

The previous prime is 91005007. The next prime is 91005049. The reversal of 91005028 is 82050019.

It is an interprime number because it is at equal distance from previous prime (91005007) and next prime (91005049).

It is a junction number, because it is equal to n+sod(n) for n = 91004993 and 91005011.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 610698 + ... + 610846.

It is an arithmetic number, because the mean of its divisors is an integer number (3534300).

Almost surely, 2^91005028 is an apocalyptic number.

It is an amenable number.

91005028 is a deficient number, since it is larger than the sum of its proper divisors (78641372).

91005028 is a wasteful number, since it uses less digits than its factorization.

91005028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316 (or 314 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 91005028 is about 9539.6555493372. The cubic root of 91005028 is about 449.8024284957.

The spelling of 91005028 in words is "ninety-one million, five thousand, twenty-eight".