1340412216 has 128 divisors (see below), whose sum is σ = 4108285440. Its totient is φ = 358617600.

The previous prime is 1340412169. The next prime is 1340412253. The reversal of 1340412216 is 6122140431.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70446 + ... + 87426.

It is an arithmetic number, because the mean of its divisors is an integer number (32095980).

Almost surely, 2^1340412216 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 1340412216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2054142720).

1340412216 is an abundant number, since it is smaller than the sum of its proper divisors (2767873224).

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

1340412216 is a wasteful number, since it uses less digits than its factorization.

1340412216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17037 (or 17033 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 1340412216 is about 36611.6404439899. The cubic root of 1340412216 is about 1102.5868089461.

Adding to 1340412216 its reverse (6122140431), we get a palindrome (7462552647).

The spelling of 1340412216 in words is "one billion, three hundred forty million, four hundred twelve thousand, two hundred sixteen".