1340396402 has 4 divisors (see below), whose sum is σ = 2010594606. Its totient is φ = 670198200.

The previous prime is 1340396381. The next prime is 1340396411. The reversal of 1340396402 is 2046930431.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 703893961 + 636502441 = 26531^2 + 25229^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335099099 + ... + 335099102.

Almost surely, 2^1340396402 is an apocalyptic number.

1340396402 is a deficient number, since it is larger than the sum of its proper divisors (670198204).

1340396402 is an equidigital number, since it uses as much as digits as its factorization.

1340396402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670198203.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 1340396402 is about 36611.4244737896. The cubic root of 1340396402 is about 1102.5824728729.

The spelling of 1340396402 in words is "one billion, three hundred forty million, three hundred ninety-six thousand, four hundred two".