1216438 has 8 divisors (see below), whose sum is σ = 1830888. Its totient is φ = 606144.

The previous prime is 1216433. The next prime is 1216441. The reversal of 1216438 is 8346121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156 + ... + 1567.

It is an arithmetic number, because the mean of its divisors is an integer number (228861).

2^1216438 is an apocalyptic number.

1216438 is a deficient number, since it is larger than the sum of its proper divisors (614450).

1216438 is a wasteful number, since it uses less digits than its factorization.

1216438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2078.

The product of its digits is 1152, while the sum is 25.

The square root of 1216438 is about 1102.9224814102. The cubic root of 1216438 is about 106.7488797605.

The spelling of 1216438 in words is "one million, two hundred sixteen thousand, four hundred thirty-eight".