1629945828 has 72 divisors (see below), whose sum is σ = 4883150272. Its totient is φ = 465696864.

The previous prime is 1629945827. The next prime is 1629945833. The reversal of 1629945828 is 8285499261.

It is a happy number.

1629945828 is a `hidden beast` number, since 1 + 629 + 9 + 4 + 5 + 8 + 2 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1629945827) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 112975 + ... + 126582.

Almost surely, 2^1629945828 is an apocalyptic number.

1629945828 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1629945828 is an abundant number, since it is smaller than the sum of its proper divisors (3253204444).

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

1629945828 is a wasteful number, since it uses less digits than its factorization.

1629945828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239583 (or 239569 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The square root of 1629945828 is about 40372.5875811794. The cubic root of 1629945828 is about 1176.8588842284.

The spelling of 1629945828 in words is "one billion, six hundred twenty-nine million, nine hundred forty-five thousand, eight hundred twenty-eight".