216090456 has 32 divisors (see below), whose sum is σ = 540927600. Its totient is φ = 71936640.

The previous prime is 216090449. The next prime is 216090461. The reversal of 216090456 is 654090612.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 14466 + ... + 25326.

Almost surely, 2^216090456 is an apocalyptic number.

It is an amenable number.

216090456 is an abundant number, since it is smaller than the sum of its proper divisors (324837144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216090456 is a wasteful number, since it uses less digits than its factorization.

216090456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11699 (or 11695 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 216090456 is about 14700.0155101959. The cubic root of 216090456 is about 600.0837438666.

The spelling of 216090456 in words is "two hundred sixteen million, ninety thousand, four hundred fifty-six".