214621940 has 96 divisors (see below), whose sum is σ = 523272960. Its totient is φ = 73230336.

The previous prime is 214621933. The next prime is 214621951. The reversal of 214621940 is 49126412.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 260369 + ... + 261191.

It is an arithmetic number, because the mean of its divisors is an integer number (5450760).

Almost surely, 2^214621940 is an apocalyptic number.

214621940 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 214621940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261636480).

214621940 is an abundant number, since it is smaller than the sum of its proper divisors (308651020).

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

214621940 is a wasteful number, since it uses less digits than its factorization.

214621940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921 (or 919 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 214621940 is about 14649.9808873595. The cubic root of 214621940 is about 598.7212953116.

The spelling of 214621940 in words is "two hundred fourteen million, six hundred twenty-one thousand, nine hundred forty".