28666024261 has 32 divisors (see below), whose sum is σ = 35545973760. Its totient is φ = 22569757056.

The previous prime is 28666024259. The next prime is 28666024279. The reversal of 28666024261 is 16242066682.

It is not a de Polignac number, because 28666024261 - 2¹ = 28666024259 is a prime.

It is a super-2 number, since 2×28666024261² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28666021261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 765210 + ... + 801796.

It is an arithmetic number, because the mean of its divisors is an integer number (1110811680).

Almost surely, 2^28666024261 is an apocalyptic number.

It is an amenable number.

28666024261 is a deficient number, since it is larger than the sum of its proper divisors (6879949499).

28666024261 is a wasteful number, since it uses less digits than its factorization.

28666024261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36793.

The product of its (nonzero) digits is 331776, while the sum is 43.

The spelling of 28666024261 in words is "twenty-eight billion, six hundred sixty-six million, twenty-four thousand, two hundred sixty-one".