1628735472 has 240 divisors, whose sum is σ = 5787367680. Its totient is φ = 429421824.

The previous prime is 1628735453. The next prime is 1628735513. The reversal of 1628735472 is 2745378261.

1628735472 is a `hidden beast` number, since 16 + 28 + 73 + 547 + 2 = 666.

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 47 ways as a sum of consecutive naturals, for example, 509463 + ... + 512649.

It is an arithmetic number, because the mean of its divisors is an integer number (24114032).

Almost surely, 2^1628735472 is an apocalyptic number.

1628735472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1628735472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2893683840).

1628735472 is an abundant number, since it is smaller than the sum of its proper divisors (4158632208).

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

1628735472 is a wasteful number, since it uses less digits than its factorization.

1628735472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3237 (or 3212 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The square root of 1628735472 is about 40357.5949729416. The cubic root of 1628735472 is about 1176.5675103452.

The spelling of 1628735472 in words is "one billion, six hundred twenty-eight million, seven hundred thirty-five thousand, four hundred seventy-two".