240403212 has 72 divisors (see below), whose sum is σ = 708708000. Its totient is φ = 68683104.

The previous prime is 240403201. The next prime is 240403223. The reversal of 240403212 is 212304042.

240403212 is a `hidden beast` number, since 240 + 403 + 21 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (240403201) and next prime (240403223).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 2614 + ... + 22082.

Almost surely, 2^240403212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 240403212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (354354000).

240403212 is an abundant number, since it is smaller than the sum of its proper divisors (468304788).

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

240403212 is a wasteful number, since it uses less digits than its factorization.

240403212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19500 (or 19481 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 240403212 is about 15504.9415348785. The cubic root of 240403212 is about 621.7943268734.

Adding to 240403212 its reverse (212304042), we get a palindrome (452707254).

The spelling of 240403212 in words is "two hundred forty million, four hundred three thousand, two hundred twelve".