1234144340 has 72 divisors (see below), whose sum is σ = 3067942920. Its totient is φ = 414247680.

The previous prime is 1234144339. The next prime is 1234144349. The reversal of 1234144340 is 434414321.

It can be written as a sum of positive squares in 4 ways, for example, as 277355716 + 956788624 = 16654^2 + 30932^2 .

It is a super-2 number, since 2×1234144340² = 3046224503908071200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1234144349) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11846 + ... + 51074.

Almost surely, 2^1234144340 is an apocalyptic number.

1234144340 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 1234144340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1533971460).

1234144340 is an abundant number, since it is smaller than the sum of its proper divisors (1833798580).

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

1234144340 is a wasteful number, since it uses less digits than its factorization.

1234144340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39273 (or 39260 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 1234144340 is about 35130.3905472171. The cubic root of 1234144340 is about 1072.6432856995.

Adding to 1234144340 its reverse (434414321), we get a palindrome (1668558661).

The spelling of 1234144340 in words is "one billion, two hundred thirty-four million, one hundred forty-four thousand, three hundred forty".