234216540 has 72 divisors (see below), whose sum is σ = 723891168. Its totient is φ = 61276800.

The previous prime is 234216533. The next prime is 234216547. The reversal of 234216540 is 45612432.

234216540 is a `hidden beast` number, since 2 + 3 + 4 + 2 + 1 + 654 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (234216533) and next prime (234216547).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (234216547) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2736 + ... + 21815.

It is an arithmetic number, because the mean of its divisors is an integer number (10054044).

Almost surely, 2^234216540 is an apocalyptic number.

234216540 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 234216540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (361945584).

234216540 is an abundant number, since it is smaller than the sum of its proper divisors (489674628).

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

234216540 is a wasteful number, since it uses less digits than its factorization.

234216540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24619 (or 24614 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 234216540 is about 15304.1347354236. The cubic root of 234216540 is about 616.4140375799.

Adding to 234216540 its reverse (45612432), we get a palindrome (279828972).

The spelling of 234216540 in words is "two hundred thirty-four million, two hundred sixteen thousand, five hundred forty".