1493639756 has 72 divisors (see below), whose sum is σ = 3094063056. Its totient is φ = 628992000.

The previous prime is 1493639699. The next prime is 1493639767. The reversal of 1493639756 is 6579363941.

It is a junction number, because it is equal to n+sod(n) for n = 1493639698 and 1493639707.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4771856 + ... + 4772168.

It is an arithmetic number, because the mean of its divisors is an integer number (42973098).

Almost surely, 2^1493639756 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1493639756, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1547031528).

1493639756 is an abundant number, since it is smaller than the sum of its proper divisors (1600423300).

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

1493639756 is a wasteful number, since it uses less digits than its factorization.

1493639756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679 (or 670 counting only the distinct ones).

The product of its digits is 3674160, while the sum is 53.

The square root of 1493639756 is about 38647.6358397250. The cubic root of 1493639756 is about 1143.0940255313.

The spelling of 1493639756 in words is "one billion, four hundred ninety-three million, six hundred thirty-nine thousand, seven hundred fifty-six".