28661004782031 has 8 divisors (see below), whose sum is σ = 39876180566400. Its totient is φ = 18276582759512.

The previous prime is 28661004781993. The next prime is 28661004782051. The reversal of 28661004782031 is 13028740016682.

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 28661004782031 - 2¹¹ = 28661004779983 is a prime.

It is a super-3 number, since 3×28661004782031³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28661004782051) 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, 207688440381 + ... + 207688440518.

It is an arithmetic number, because the mean of its divisors is an integer number (4984522570800).

Almost surely, 2^{28661004782031} is an apocalyptic number.

28661004782031 is a deficient number, since it is larger than the sum of its proper divisors (11215175784369).

28661004782031 is a wasteful number, since it uses less digits than its factorization.

28661004782031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415376880925.

The product of its (nonzero) digits is 774144, while the sum is 48.

The spelling of 28661004782031 in words is "twenty-eight trillion, six hundred sixty-one billion, four million, seven hundred eighty-two thousand, thirty-one".