91820152 has 8 divisors (see below), whose sum is σ = 172162800. Its totient is φ = 45910072.

The previous prime is 91820149. The next prime is 91820153. The reversal of 91820152 is 25102819.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 91820152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91820153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5738752 + ... + 5738767.

It is an arithmetic number, because the mean of its divisors is an integer number (21520350).

Almost surely, 2^91820152 is an apocalyptic number.

It is an amenable number.

91820152 is a deficient number, since it is larger than the sum of its proper divisors (80342648).

91820152 is a wasteful number, since it uses less digits than its factorization.

91820152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11477525 (or 11477521 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 91820152 is about 9582.2832352211. The cubic root of 91820152 is about 451.1413856550.

The spelling of 91820152 in words is "ninety-one million, eight hundred twenty thousand, one hundred fifty-two".