90180442 has 16 divisors (see below), whose sum is σ = 148005792. Its totient is φ = 40869520.

The previous prime is 90180439. The next prime is 90180449. The reversal of 90180442 is 24408109.

It is a self number, because there is not a number n which added to its sum of digits gives 90180442.

It is not an unprimeable number, because it can be changed into a prime (90180449) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1728 + ... + 13540.

It is an arithmetic number, because the mean of its divisors is an integer number (9250362).

Almost surely, 2^90180442 is an apocalyptic number.

90180442 is a deficient number, since it is larger than the sum of its proper divisors (57825350).

90180442 is a wasteful number, since it uses less digits than its factorization.

90180442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12173.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 90180442 is about 9496.3383469630. The cubic root of 90180442 is about 448.4397686644.

The spelling of 90180442 in words is "ninety million, one hundred eighty thousand, four hundred forty-two".