2803949840 has 20 divisors (see below), whose sum is σ = 6519183564. Its totient is φ = 1121579904.

The previous prime is 2803949831. The next prime is 2803949857. The reversal of 2803949840 is 489493082.

It can be written as a sum of positive squares in 2 ways, for example, as 527896576 + 2276053264 = 22976^2 + 47708^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17524607 + ... + 17524766.

Almost surely, 2^2803949840 is an apocalyptic number.

2803949840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2803949840 is an abundant number, since it is smaller than the sum of its proper divisors (3715233724).

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

2803949840 is a wasteful number, since it uses less digits than its factorization.

2803949840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35049386 (or 35049380 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 47.

The square root of 2803949840 is about 52952.3355481135. The cubic root of 2803949840 is about 1410.1221898367.

The spelling of 2803949840 in words is "two billion, eight hundred three million, nine hundred forty-nine thousand, eight hundred forty".