1629749928 has 32 divisors (see below), whose sum is σ = 4288816800. Its totient is φ = 514657728.

The previous prime is 1629749921. The next prime is 1629749941. The reversal of 1629749928 is 8299479261.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (1629749921) 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, 1786551 + ... + 1787462.

It is an arithmetic number, because the mean of its divisors is an integer number (134025525).

Almost surely, 2^1629749928 is an apocalyptic number.

It is an amenable number.

1629749928 is an abundant number, since it is smaller than the sum of its proper divisors (2659066872).

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

1629749928 is a wasteful number, since it uses less digits than its factorization.

1629749928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3574041 (or 3574037 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 57.

The square root of 1629749928 is about 40370.1613571212. The cubic root of 1629749928 is about 1176.8117342171.

The spelling of 1629749928 in words is "one billion, six hundred twenty-nine million, seven hundred forty-nine thousand, nine hundred twenty-eight".