40343212 has 48 divisors (see below), whose sum is σ = 87635520. Its totient is φ = 15823872.

The previous prime is 40343207. The next prime is 40343239. The reversal of 40343212 is 21234304.

It is a self number, because there is not a number n which added to its sum of digits gives 40343212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49464 + ... + 50272.

It is an arithmetic number, because the mean of its divisors is an integer number (1825740).

Almost surely, 2^40343212 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 40343212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43817760).

40343212 is an abundant number, since it is smaller than the sum of its proper divisors (47292308).

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

40343212 is a wasteful number, since it uses less digits than its factorization.

40343212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970 (or 968 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 40343212 is about 6351.6306567684. The cubic root of 40343212 is about 342.9705454567.

Adding to 40343212 its reverse (21234304), we get a palindrome (61577516).

The spelling of 40343212 in words is "forty million, three hundred forty-three thousand, two hundred twelve".