1340404277 has 4 divisors (see below), whose sum is σ = 1340539200. Its totient is φ = 1340269356.

The previous prime is 1340404271. The next prime is 1340404309. The reversal of 1340404277 is 7724040431.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1340404277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340404271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51263 + ... + 72860.

It is an arithmetic number, because the mean of its divisors is an integer number (335134800).

Almost surely, 2^1340404277 is an apocalyptic number.

It is an amenable number.

1340404277 is a deficient number, since it is larger than the sum of its proper divisors (134923).

1340404277 is a wasteful number, since it uses less digits than its factorization.

1340404277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134922.

The product of its (nonzero) digits is 18816, while the sum is 32.

The square root of 1340404277 is about 36611.5320220283. The cubic root of 1340404277 is about 1102.5846321397.

The spelling of 1340404277 in words is "one billion, three hundred forty million, four hundred four thousand, two hundred seventy-seven".