1340432402 has 8 divisors (see below), whose sum is σ = 2023455756. Its totient is φ = 665947152.

The previous prime is 1340432399. The next prime is 1340432413. The reversal of 1340432402 is 2042340431.

It can be written as a sum of positive squares in 2 ways, for example, as 1340365321 + 67081 = 36611^2 + 259^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2134133 + ... + 2134760.

Almost surely, 2^1340432402 is an apocalyptic number.

1340432402 is a deficient number, since it is larger than the sum of its proper divisors (683023354).

1340432402 is a wasteful number, since it uses less digits than its factorization.

1340432402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4269052.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 1340432402 is about 36611.9161203016. The cubic root of 1340432402 is about 1102.5923437374.

Adding to 1340432402 its reverse (2042340431), we get a palindrome (3382772833).

The spelling of 1340432402 in words is "one billion, three hundred forty million, four hundred thirty-two thousand, four hundred two".