1340716440 has 96 divisors (see below), whose sum is σ = 4678847280. Its totient is φ = 306448128.

The previous prime is 1340716439. The next prime is 1340716457. The reversal of 1340716440 is 446170431.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1340716398 and 1340716407.

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, 108127 + ... + 119886.

Almost surely, 2^1340716440 is an apocalyptic number.

1340716440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1340716440 is an abundant number, since it is smaller than the sum of its proper divisors (3338130840).

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

1340716440 is a wasteful number, since it uses less digits than its factorization.

1340716440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228041 (or 228030 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 1340716440 is about 36615.7949524519. The cubic root of 1340716440 is about 1102.6702181122.

Adding to 1340716440 its reverse (446170431), we get a palindrome (1786886871).

The spelling of 1340716440 in words is "one billion, three hundred forty million, seven hundred sixteen thousand, four hundred forty".