28946939044 has 27 divisors (see below), whose sum is σ = 51243195843. Its totient is φ = 14307925248.

The previous prime is 28946939039. The next prime is 28946939051. The reversal of 28946939044 is 44093964982.

It is a happy number.

The square root of 28946939044 is 170138.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 2974393444 + 25972545600 = 54538^2 + 161160^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28946939044.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 33006334 + ... + 33007210.

Almost surely, 2^28946939044 is an apocalyptic number.

28946939044 is the 170138-th square number.

It is an amenable number.

28946939044 is a deficient number, since it is larger than the sum of its proper divisors (22296256799).

28946939044 is an frugal number, since it uses more digits than its factorization.

28946939044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1952 (or 976 counting only the distinct ones).

The product of its (nonzero) digits is 13436928, while the sum is 58.

The spelling of 28946939044 in words is "twenty-eight billion, nine hundred forty-six million, nine hundred thirty-nine thousand, forty-four".