1340440234 has 32 divisors (see below), whose sum is σ = 2459865600. Its totient is φ = 535008240.

The previous prime is 1340440229. The next prime is 1340440267. The reversal of 1340440234 is 4320440431.

It is a junction number, because it is equal to n+sod(n) for n = 1340440199 and 1340440208.

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, 27012 + ... + 58399.

It is an arithmetic number, because the mean of its divisors is an integer number (76870800).

Almost surely, 2^1340440234 is an apocalyptic number.

1340440234 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1340440234 is a deficient number, since it is larger than the sum of its proper divisors (1119425366).

1340440234 is a wasteful number, since it uses less digits than its factorization.

1340440234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85498.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 1340440234 is about 36612.0230798573. The cubic root of 1340440234 is about 1102.5944911754.

Adding to 1340440234 its reverse (4320440431), we get a palindrome (5660880665).

The spelling of 1340440234 in words is "one billion, three hundred forty million, four hundred forty thousand, two hundred thirty-four".