28976897924 has 12 divisors (see below), whose sum is σ = 54610307724. Its totient is φ = 13373952864.

The previous prime is 28976897923. The next prime is 28976897927. The reversal of 28976897924 is 42979867982.

It can be written as a sum of positive squares in 2 ways, for example, as 17691660100 + 11285237824 = 133010^2 + 106232^2 .

It is a super-2 number, since 2×28976897924² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28976897923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278623967 + ... + 278624070.

It is an arithmetic number, because the mean of its divisors is an integer number (4550858977).

Almost surely, 2^28976897924 is an apocalyptic number.

It is an amenable number.

28976897924 is a deficient number, since it is larger than the sum of its proper divisors (25633409800).

28976897924 is a wasteful number, since it uses less digits than its factorization.

28976897924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557248054 (or 557248052 counting only the distinct ones).

The product of its digits is 219469824, while the sum is 71.

The spelling of 28976897924 in words is "twenty-eight billion, nine hundred seventy-six million, eight hundred ninety-seven thousand, nine hundred twenty-four".