28993513997 has 8 divisors (see below), whose sum is σ = 33338730816. Its totient is φ = 24699118752.

The previous prime is 28993513979. The next prime is 28993514003. The reversal of 28993513997 is 79931539982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28993513997 - 2²² = 28989319693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28993513907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12704168 + ... + 12706449.

It is an arithmetic number, because the mean of its divisors is an integer number (4167341352).

Almost surely, 2^28993513997 is an apocalyptic number.

It is an amenable number.

28993513997 is a deficient number, since it is larger than the sum of its proper divisors (4345216819).

28993513997 is a wasteful number, since it uses less digits than its factorization.

28993513997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25410787.

The product of its digits is 33067440, while the sum is 65.

The spelling of 28993513997 in words is "twenty-eight billion, nine hundred ninety-three million, five hundred thirteen thousand, nine hundred ninety-seven".