1340399236 has 24 divisors (see below), whose sum is σ = 2569160160. Its totient is φ = 606840000.

The previous prime is 1340399231. The next prime is 1340399237. The reversal of 1340399236 is 6329930431.

It is a super-2 number, since 2×1340399236² = 3593340223738767392, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1340399231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49641 + ... + 71728.

It is an arithmetic number, because the mean of its divisors is an integer number (107048340).

Almost surely, 2^1340399236 is an apocalyptic number.

It is an amenable number.

1340399236 is a deficient number, since it is larger than the sum of its proper divisors (1228760924).

1340399236 is a wasteful number, since it uses less digits than its factorization.

1340399236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121635 (or 121633 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 40.

The square root of 1340399236 is about 36611.4631775350. The cubic root of 1340399236 is about 1102.5832499357.

The spelling of 1340399236 in words is "one billion, three hundred forty million, three hundred ninety-nine thousand, two hundred thirty-six".