1647328480 has 48 divisors (see below), whose sum is σ = 4447789920. Its totient is φ = 564797952.

The previous prime is 1647328477. The next prime is 1647328489. The reversal of 1647328480 is 848237461.

It is a super-2 number, since 2×1647328480² = 5427382242038220800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1647328489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 734295 + ... + 736534.

It is an arithmetic number, because the mean of its divisors is an integer number (92662290).

Almost surely, 2^1647328480 is an apocalyptic number.

1647328480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1647328480 is an abundant number, since it is smaller than the sum of its proper divisors (2800461440).

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

1647328480 is a wasteful number, since it uses less digits than its factorization.

1647328480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1470851 (or 1470843 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 43.

The square root of 1647328480 is about 40587.2945636932. The cubic root of 1647328480 is about 1181.0276597662.

The spelling of 1647328480 in words is "one billion, six hundred forty-seven million, three hundred twenty-eight thousand, four hundred eighty".