214218928 has 160 divisors (see below), whose sum is σ = 548536320. Its totient is φ = 78624000.

The previous prime is 214218919. The next prime is 214218931. The reversal of 214218928 is 829812412.

It is a happy number.

It is a super-2 number, since 2×214218928² = 91779498226938368, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2711593 + ... + 2711671.

It is an arithmetic number, because the mean of its divisors is an integer number (3428352).

Almost surely, 2^214218928 is an apocalyptic number.

214218928 is a gapful number since it is divisible by the number (28) 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 214218928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274268160).

214218928 is an abundant number, since it is smaller than the sum of its proper divisors (334317392).

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

214218928 is a wasteful number, since it uses less digits than its factorization.

214218928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207 (or 201 counting only the distinct ones).

The product of its digits is 18432, while the sum is 37.

The square root of 214218928 is about 14636.2197305178. The cubic root of 214218928 is about 598.3463056047.

The spelling of 214218928 in words is "two hundred fourteen million, two hundred eighteen thousand, nine hundred twenty-eight".