1493657738 has 16 divisors (see below), whose sum is σ = 2268414720. Its totient is φ = 737564400.

The previous prime is 1493657729. The next prime is 1493657771. The reversal of 1493657738 is 8377563941.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1493657738.

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, 56783 + ... + 78813.

It is an arithmetic number, because the mean of its divisors is an integer number (141775920).

Almost surely, 2^1493657738 is an apocalyptic number.

1493657738 is a deficient number, since it is larger than the sum of its proper divisors (774756982).

1493657738 is a wasteful number, since it uses less digits than its factorization.

1493657738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22453.

The product of its digits is 3810240, while the sum is 53.

The square root of 1493657738 is about 38647.8684793871. The cubic root of 1493657738 is about 1143.0986127673.

The spelling of 1493657738 in words is "one billion, four hundred ninety-three million, six hundred fifty-seven thousand, seven hundred thirty-eight".