214028640 has 288 divisors, whose sum is σ = 884520000. Its totient is φ = 46006272.

The previous prime is 214028579. The next prime is 214028641. The reversal of 214028640 is 46820412.

214028640 is a `hidden beast` number, since 2 + 14 + 0 + 2 + 8 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214028641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 170736 + ... + 171984.

It is an arithmetic number, because the mean of its divisors is an integer number (3071250).

Almost surely, 2^214028640 is an apocalyptic number.

214028640 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 214028640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (442260000).

214028640 is an abundant number, since it is smaller than the sum of its proper divisors (670491360).

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

214028640 is a wasteful number, since it uses less digits than its factorization.

214028640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294 (or 1283 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 214028640 is about 14629.7177006257. The cubic root of 214028640 is about 598.1690852684.

The spelling of 214028640 in words is "two hundred fourteen million, twenty-eight thousand, six hundred forty".