1649828939 has 16 divisors (see below), whose sum is σ = 1891814400. Its totient is φ = 1424132160.

The previous prime is 1649828923. The next prime is 1649828941. The reversal of 1649828939 is 9398289461.

It is not a de Polignac number, because 1649828939 - 2⁴ = 1649828923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1649828909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10862 + ... + 58460.

It is an arithmetic number, because the mean of its divisors is an integer number (118238400).

Almost surely, 2^1649828939 is an apocalyptic number.

1649828939 is a deficient number, since it is larger than the sum of its proper divisors (241985461).

1649828939 is a wasteful number, since it uses less digits than its factorization.

1649828939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47770.

The product of its digits is 6718464, while the sum is 59.

The square root of 1649828939 is about 40618.0863532491. The cubic root of 1649828939 is about 1181.6249133138.

The spelling of 1649828939 in words is "one billion, six hundred forty-nine million, eight hundred twenty-eight thousand, nine hundred thirty-nine".