1340783428 has 12 divisors (see below), whose sum is σ = 2364283152. Its totient is φ = 665273960.

The previous prime is 1340783417. The next prime is 1340783471. The reversal of 1340783428 is 8243870431.

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, 1278850 + ... + 1279897.

It is an arithmetic number, because the mean of its divisors is an integer number (197023596).

Almost surely, 2^1340783428 is an apocalyptic number.

It is an amenable number.

1340783428 is a deficient number, since it is larger than the sum of its proper divisors (1023499724).

1340783428 is a wasteful number, since it uses less digits than its factorization.

1340783428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2558882 (or 2558880 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 40.

The square root of 1340783428 is about 36616.7096828757. The cubic root of 1340783428 is about 1102.6885825330.

The spelling of 1340783428 in words is "one billion, three hundred forty million, seven hundred eighty-three thousand, four hundred twenty-eight".