216467998 has 8 divisors (see below), whose sum is σ = 327575808. Its totient is φ = 107276064.

The previous prime is 216467981. The next prime is 216468017. The reversal of 216467998 is 899764612.

It is a happy number.

216467998 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 a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 478686 + ... + 479137.

It is an arithmetic number, because the mean of its divisors is an integer number (40946976).

Almost surely, 2^216467998 is an apocalyptic number.

216467998 is a deficient number, since it is larger than the sum of its proper divisors (111107810).

216467998 is a wasteful number, since it uses less digits than its factorization.

216467998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957938.

The product of its digits is 1306368, while the sum is 52.

The square root of 216467998 is about 14712.8514571445. The cubic root of 216467998 is about 600.4330188974.

The spelling of 216467998 in words is "two hundred sixteen million, four hundred sixty-seven thousand, nine hundred ninety-eight".