46991218 has 8 divisors (see below), whose sum is σ = 74196720. Its totient is φ = 22258980.

The previous prime is 46991209. The next prime is 46991233. The reversal of 46991218 is 81219964.

46991218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 618268 + ... + 618343.

It is an arithmetic number, because the mean of its divisors is an integer number (9274590).

Almost surely, 2^46991218 is an apocalyptic number.

46991218 is a deficient number, since it is larger than the sum of its proper divisors (27205502).

46991218 is a wasteful number, since it uses less digits than its factorization.

46991218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1236632.

The product of its digits is 31104, while the sum is 40.

The square root of 46991218 is about 6855.0140773014. The cubic root of 46991218 is about 360.8601295140.

The spelling of 46991218 in words is "forty-six million, nine hundred ninety-one thousand, two hundred eighteen".