1214313640 has 16 divisors (see below), whose sum is σ = 2732205780. Its totient is φ = 485725440.

The previous prime is 1214313637. The next prime is 1214313643. The reversal of 1214313640 is 463134121.

It is an interprime number because it is at equal distance from previous prime (1214313637) and next prime (1214313643).

It can be written as a sum of positive squares in 2 ways, for example, as 1201454244 + 12859396 = 34662^2 + 3586^2 .

It is not an unprimeable number, because it can be changed into a prime (1214313643) 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, 15178881 + ... + 15178960.

Almost surely, 2^1214313640 is an apocalyptic number.

1214313640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1214313640 is an abundant number, since it is smaller than the sum of its proper divisors (1517892140).

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

1214313640 is a wasteful number, since it uses less digits than its factorization.

1214313640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30357852 (or 30357848 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 1214313640 is about 34847.0033144889. The cubic root of 1214313640 is about 1066.8670226939.

Adding to 1214313640 its reverse (463134121), we get a palindrome (1677447761).

The spelling of 1214313640 in words is "one billion, two hundred fourteen million, three hundred thirteen thousand, six hundred forty".