28974240521 has 8 divisors (see below), whose sum is σ = 29653017504. Its totient is φ = 28295688960.

The previous prime is 28974240481. The next prime is 28974240523. The reversal of 28974240521 is 12504247982.

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

It is a cyclic number.

It is not a de Polignac number, because 28974240521 - 2⁶ = 28974240457 is a prime.

It is a super-2 number, since 2×28974240521² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28974240523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219326 + ... + 325656.

It is an arithmetic number, because the mean of its divisors is an integer number (3706627188).

Almost surely, 2^28974240521 is an apocalyptic number.

It is an amenable number.

28974240521 is a deficient number, since it is larger than the sum of its proper divisors (678776983).

28974240521 is a wasteful number, since it uses less digits than its factorization.

28974240521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112711.

The product of its (nonzero) digits is 322560, while the sum is 44.

The spelling of 28974240521 in words is "twenty-eight billion, nine hundred seventy-four million, two hundred forty thousand, five hundred twenty-one".