1213002240 has 160 divisors (see below), whose sum is σ = 3945015360. Its totient is φ = 317865984.

The previous prime is 1213002239. The next prime is 1213002257. The reversal of 1213002240 is 422003121.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 451782 + ... + 454458.

It is an arithmetic number, because the mean of its divisors is an integer number (24656346).

Almost surely, 2^1213002240 is an apocalyptic number.

1213002240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1213002240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1972507680).

1213002240 is an abundant number, since it is smaller than the sum of its proper divisors (2732013120).

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

1213002240 is an equidigital number, since it uses as much as digits as its factorization.

1213002240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2762 (or 2746 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1213002240 is about 34828.1816924168. The cubic root of 1213002240 is about 1066.4828294291.

Adding to 1213002240 its reverse (422003121), we get a palindrome (1635005361).

The spelling of 1213002240 in words is "one billion, two hundred thirteen million, two thousand, two hundred forty".