1340744428 has 24 divisors (see below), whose sum is σ = 2449772640. Its totient is φ = 640844160.

The previous prime is 1340744413. The next prime is 1340744453. The reversal of 1340744428 is 8244470431.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206658 + ... + 213046.

It is an arithmetic number, because the mean of its divisors is an integer number (102073860).

Almost surely, 2^1340744428 is an apocalyptic number.

It is an amenable number.

1340744428 is a deficient number, since it is larger than the sum of its proper divisors (1109028212).

1340744428 is a wasteful number, since it uses less digits than its factorization.

1340744428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8697 (or 8695 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 37.

The square root of 1340744428 is about 36616.1771352499. The cubic root of 1340744428 is about 1102.6778909550.

The spelling of 1340744428 in words is "one billion, three hundred forty million, seven hundred forty-four thousand, four hundred twenty-eight".