90184894 has 4 divisors (see below), whose sum is σ = 135277344. Its totient is φ = 45092446.

The previous prime is 90184891. The next prime is 90184931. The reversal of 90184894 is 49848109.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 90184894.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90184891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22546222 + ... + 22546225.

It is an arithmetic number, because the mean of its divisors is an integer number (33819336).

Almost surely, 2^90184894 is an apocalyptic number.

90184894 is a deficient number, since it is larger than the sum of its proper divisors (45092450).

90184894 is a wasteful number, since it uses less digits than its factorization.

90184894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45092449.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 90184894 is about 9496.5727502084. The cubic root of 90184894 is about 448.4471480213.

The spelling of 90184894 in words is "ninety million, one hundred eighty-four thousand, eight hundred ninety-four".