1214231440 has 40 divisors (see below), whose sum is σ = 2825533440. Its totient is φ = 485271936.

The previous prime is 1214231401. The next prime is 1214231453. The reversal of 1214231440 is 441324121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96387 + ... + 108253.

It is an arithmetic number, because the mean of its divisors is an integer number (70638336).

Almost surely, 2^1214231440 is an apocalyptic number.

1214231440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1214231440 is an abundant number, since it is smaller than the sum of its proper divisors (1611302000).

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

1214231440 is a wasteful number, since it uses less digits than its factorization.

1214231440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13159 (or 13153 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 1214231440 is about 34845.8238530817. The cubic root of 1214231440 is about 1066.8429491637.

Adding to 1214231440 its reverse (441324121), we get a palindrome (1655555561).

The spelling of 1214231440 in words is "one billion, two hundred fourteen million, two hundred thirty-one thousand, four hundred forty".