1649823028 has 48 divisors (see below), whose sum is σ = 3447521280. Its totient is φ = 675458784.

The previous prime is 1649822989. The next prime is 1649823031. The reversal of 1649823028 is 8203289461.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 822675 + ... + 824677.

It is an arithmetic number, because the mean of its divisors is an integer number (71823360).

Almost surely, 2^1649823028 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1649823028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1723760640).

1649823028 is an abundant number, since it is smaller than the sum of its proper divisors (1797698252).

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

1649823028 is a wasteful number, since it uses less digits than its factorization.

1649823028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3316 (or 3314 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 1649823028 is about 40618.0135900317. The cubic root of 1649823028 is about 1181.6235021386.

The spelling of 1649823028 in words is "one billion, six hundred forty-nine million, eight hundred twenty-three thousand, twenty-eight".