28531472061 has 8 divisors (see below), whose sum is σ = 38044519744. Its totient is φ = 19019702880.

The previous prime is 28531472017. The next prime is 28531472069. The reversal of 28531472061 is 16027413582.

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

It is not a de Polignac number, because 28531472061 - 2¹⁴ = 28531455677 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 (28531472069) 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, 266281 + ... + 357726.

It is an arithmetic number, because the mean of its divisors is an integer number (4755564968).

Almost surely, 2^28531472061 is an apocalyptic number.

It is an amenable number.

28531472061 is a deficient number, since it is larger than the sum of its proper divisors (9513047683).

28531472061 is a wasteful number, since it uses less digits than its factorization.

28531472061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639251.

The product of its (nonzero) digits is 80640, while the sum is 39.

The spelling of 28531472061 in words is "twenty-eight billion, five hundred thirty-one million, four hundred seventy-two thousand, sixty-one".