1649330280 has 96 divisors (see below), whose sum is σ = 5772672360. Its totient is φ = 405987840.

The previous prime is 1649330269. The next prime is 1649330351. The reversal of 1649330280 is 820339461.

1649330280 is a `hidden beast` number, since 1 + 6 + 49 + 330 + 280 = 666.

1649330280 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1366485156 + 282845124 = 36966^2 + 16818^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

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 23 ways as a sum of consecutive naturals, for example, 171531 + ... + 180890.

Almost surely, 2^1649330280 is an apocalyptic number.

1649330280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1649330280 is an abundant number, since it is smaller than the sum of its proper divisors (4123342080).

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

1649330280 is a wasteful number, since it uses less digits than its factorization.

1649330280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352451 (or 352444 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 1649330280 is about 40611.9475031671. The cubic root of 1649330280 is about 1181.5058530367.

The spelling of 1649330280 in words is "one billion, six hundred forty-nine million, three hundred thirty thousand, two hundred eighty".