1340457928 has 8 divisors (see below), whose sum is σ = 2513358630. Its totient is φ = 670228960.

The previous prime is 1340457913. The next prime is 1340457929. The reversal of 1340457928 is 8297540431.

It can be written as a sum of positive squares in only one way, i.e., 957159844 + 383298084 = 30938^2 + 19578^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1340457929) by changing a digit.

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 as a sum of consecutive naturals, namely, 83778613 + ... + 83778628.

Almost surely, 2^1340457928 is an apocalyptic number.

It is an amenable number.

1340457928 is a deficient number, since it is larger than the sum of its proper divisors (1172900702).

1340457928 is a wasteful number, since it uses less digits than its factorization.

1340457928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167557247 (or 167557243 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 1340457928 is about 36612.2647209921. The cubic root of 1340457928 is about 1102.5993426216.

The spelling of 1340457928 in words is "one billion, three hundred forty million, four hundred fifty-seven thousand, nine hundred twenty-eight".