216801398 has 16 divisors (see below), whose sum is σ = 355089744. Its totient is φ = 98456160.

The previous prime is 216801397. The next prime is 216801413. The reversal of 216801398 is 893108612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216801397) by changing a digit.

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, 24236 + ... + 31952.

It is an arithmetic number, because the mean of its divisors is an integer number (22193109).

Almost surely, 2^216801398 is an apocalyptic number.

216801398 is a deficient number, since it is larger than the sum of its proper divisors (138288346).

216801398 is a wasteful number, since it uses less digits than its factorization.

216801398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9007.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 216801398 is about 14724.1773284622. The cubic root of 216801398 is about 600.7411193784.

The spelling of 216801398 in words is "two hundred sixteen million, eight hundred one thousand, three hundred ninety-eight".