240216840 has 160 divisors (see below), whose sum is σ = 814397760. Its totient is φ = 63504000.

The previous prime is 240216811. The next prime is 240216863. The reversal of 240216840 is 48612042.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 488995 + ... + 489485.

It is an arithmetic number, because the mean of its divisors is an integer number (5089986).

Almost surely, 2^240216840 is an apocalyptic number.

240216840 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 240216840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (407198880).

240216840 is an abundant number, since it is smaller than the sum of its proper divisors (574180920).

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

240216840 is a wasteful number, since it uses less digits than its factorization.

240216840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665 (or 652 counting only the distinct ones).

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

The square root of 240216840 is about 15498.9302856681. The cubic root of 240216840 is about 621.6336038243.

Adding to 240216840 its reverse (48612042), we get a palindrome (288828882).

The spelling of 240216840 in words is "two hundred forty million, two hundred sixteen thousand, eight hundred forty".