1400340406 has 8 divisors (see below), whose sum is σ = 2157281280. Its totient is φ = 681246648.

The previous prime is 1400340391. The next prime is 1400340421. The reversal of 1400340406 is 6040430041.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1400340391) and next prime (1400340421).

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

It is a congruent number.

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, 9461686 + ... + 9461833.

It is an arithmetic number, because the mean of its divisors is an integer number (269660160).

Almost surely, 2^1400340406 is an apocalyptic number.

1400340406 is a deficient number, since it is larger than the sum of its proper divisors (756940874).

1400340406 is a wasteful number, since it uses less digits than its factorization.

1400340406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18923558.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1400340406 is about 37421.1224577778. The cubic root of 1400340406 is about 1118.7796034071.

Adding to 1400340406 its reverse (6040430041), we get a palindrome (7440770447).

The spelling of 1400340406 in words is "one billion, four hundred million, three hundred forty thousand, four hundred six".