1397068340 has 24 divisors (see below), whose sum is σ = 2989201320. Its totient is φ = 548283008.

The previous prime is 1397068331. The next prime is 1397068357. The reversal of 1397068340 is 438607931.

It can be written as a sum of positive squares in 4 ways, for example, as 6822544 + 1390245796 = 2612^2 + 37286^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 657935 + ... + 660054.

It is an arithmetic number, because the mean of its divisors is an integer number (124550055).

Almost surely, 2^1397068340 is an apocalyptic number.

1397068340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1397068340 is an abundant number, since it is smaller than the sum of its proper divisors (1592132980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1397068340 is a wasteful number, since it uses less digits than its factorization.

1397068340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1318051 (or 1318049 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 1397068340 is about 37377.3773825826. The cubic root of 1397068340 is about 1117.9075355315.

The spelling of 1397068340 in words is "one billion, three hundred ninety-seven million, sixty-eight thousand, three hundred forty".