216958000 has 80 divisors (see below), whose sum is σ = 599586624. Its totient is φ = 74380800.

The previous prime is 216957989. The next prime is 216958009. The reversal of 216958000 is 859612.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (216958009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6252 + ... + 21748.

Almost surely, 2^216958000 is an apocalyptic number.

216958000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216958000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299793312).

216958000 is an abundant number, since it is smaller than the sum of its proper divisors (382628624).

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

216958000 is a wasteful number, since it uses less digits than its factorization.

216958000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15527 (or 15511 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 216958000 is about 14729.4942207803. The cubic root of 216958000 is about 600.8857288676.

The spelling of 216958000 in words is "two hundred sixteen million, nine hundred fifty-eight thousand".