1493609680 has 20 divisors (see below), whose sum is σ = 3472642692. Its totient is φ = 597443840.

The previous prime is 1493609653. The next prime is 1493609693. The reversal of 1493609680 is 869063941.

It can be written as a sum of positive squares in 2 ways, for example, as 389509696 + 1104099984 = 19736^2 + 33228^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 1493609680.

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 3 ways as a sum of consecutive naturals, for example, 9334981 + ... + 9335140.

Almost surely, 2^1493609680 is an apocalyptic number.

1493609680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1493609680 is an abundant number, since it is smaller than the sum of its proper divisors (1979033012).

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

1493609680 is a wasteful number, since it uses less digits than its factorization.

1493609680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18670134 (or 18670128 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 1493609680 is about 38647.2467324647. The cubic root of 1493609680 is about 1143.0863530149.

The spelling of 1493609680 in words is "one billion, four hundred ninety-three million, six hundred nine thousand, six hundred eighty".