1340809370 has 32 divisors (see below), whose sum is σ = 2469035520. Its totient is φ = 524056000.

The previous prime is 1340809361. The next prime is 1340809381. The reversal of 1340809370 is 739080431.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1340809370.

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, 127991 + ... + 138069.

It is an arithmetic number, because the mean of its divisors is an integer number (77157360).

Almost surely, 2^1340809370 is an apocalyptic number.

1340809370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1340809370 is a deficient number, since it is larger than the sum of its proper divisors (1128226150).

1340809370 is a wasteful number, since it uses less digits than its factorization.

1340809370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10390.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 1340809370 is about 36617.0639183428. The cubic root of 1340809370 is about 1102.6956942365.

The spelling of 1340809370 in words is "one billion, three hundred forty million, eight hundred nine thousand, three hundred seventy".