1234400340 has 72 divisors (see below), whose sum is σ = 3613222368. Its totient is φ = 314853440.

The previous prime is 1234400329. The next prime is 1234400351. The reversal of 1234400340 is 430044321.

It is an interprime number because it is at equal distance from previous prime (1234400329) and next prime (1234400351).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12295 + ... + 51185.

It is an arithmetic number, because the mean of its divisors is an integer number (50183644).

Almost surely, 2^1234400340 is an apocalyptic number.

1234400340 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 1234400340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1806611184).

1234400340 is an abundant number, since it is smaller than the sum of its proper divisors (2378822028).

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

1234400340 is a wasteful number, since it uses less digits than its factorization.

1234400340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38949 (or 38924 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 1234400340 is about 35134.0339272336. The cubic root of 1234400340 is about 1072.7174471213.

Adding to 1234400340 its reverse (430044321), we get a palindrome (1664444661).

The spelling of 1234400340 in words is "one billion, two hundred thirty-four million, four hundred thousand, three hundred forty".