1340400402 has 24 divisors (see below), whose sum is σ = 3168219600. Its totient is φ = 406181880.

The previous prime is 1340400401. The next prime is 1340400407. The reversal of 1340400402 is 2040040431.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1340400401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3384652 + ... + 3385047.

It is an arithmetic number, because the mean of its divisors is an integer number (132009150).

Almost surely, 2^1340400402 is an apocalyptic number.

1340400402 is an abundant number, since it is smaller than the sum of its proper divisors (1827819198).

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

1340400402 is a wasteful number, since it uses less digits than its factorization.

1340400402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6769718 (or 6769715 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 1340400402 is about 36611.4791015059. The cubic root of 1340400402 is about 1102.5835696444.

Adding to 1340400402 its reverse (2040040431), we get a palindrome (3380440833).

The spelling of 1340400402 in words is "one billion, three hundred forty million, four hundred thousand, four hundred two".