90290216 has 8 divisors (see below), whose sum is σ = 169294170. Its totient is φ = 45145104.

The previous prime is 90290209. The next prime is 90290231. The reversal of 90290216 is 61209209.

It can be written as a sum of positive squares in only one way, i.e., 71402500 + 18887716 = 8450^2 + 4346^2 .

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

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 as a sum of consecutive naturals, namely, 5643131 + ... + 5643146.

Almost surely, 2^90290216 is an apocalyptic number.

It is an amenable number.

90290216 is a deficient number, since it is larger than the sum of its proper divisors (79003954).

90290216 is a wasteful number, since it uses less digits than its factorization.

90290216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11286283 (or 11286279 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 90290216 is about 9502.1163958352. The cubic root of 90290216 is about 448.6216523980.

The spelling of 90290216 in words is "ninety million, two hundred ninety thousand, two hundred sixteen".