214947640 has 16 divisors (see below), whose sum is σ = 483632280. Its totient is φ = 85979040.

The previous prime is 214947637. The next prime is 214947641. The reversal of 214947640 is 46749412.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 214947640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214947641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2686806 + ... + 2686885.

Almost surely, 2^214947640 is an apocalyptic number.

214947640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

214947640 is an abundant number, since it is smaller than the sum of its proper divisors (268684640).

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

214947640 is a wasteful number, since it uses less digits than its factorization.

214947640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5373702 (or 5373698 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 214947640 is about 14661.0927287157. The cubic root of 214947640 is about 599.0240058458.

The spelling of 214947640 in words is "two hundred fourteen million, nine hundred forty-seven thousand, six hundred forty".