1656317328 has 80 divisors (see below), whose sum is σ = 4338888960. Its totient is φ = 544413312.

The previous prime is 1656317297. The next prime is 1656317329. The reversal of 1656317328 is 8237136561.

It is a self number, because there is not a number n which added to its sum of digits gives 1656317328.

It is not an unprimeable number, because it can be changed into a prime (1656317329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1086775 + ... + 1088297.

It is an arithmetic number, because the mean of its divisors is an integer number (54236112).

Almost surely, 2^1656317328 is an apocalyptic number.

It is an amenable number.

1656317328 is an abundant number, since it is smaller than the sum of its proper divisors (2682571632).

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

1656317328 is a wasteful number, since it uses less digits than its factorization.

1656317328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1836 (or 1830 counting only the distinct ones).

The product of its digits is 181440, while the sum is 42.

The square root of 1656317328 is about 40697.8786670755. The cubic root of 1656317328 is about 1183.1719046780.

The spelling of 1656317328 in words is "one billion, six hundred fifty-six million, three hundred seventeen thousand, three hundred twenty-eight".