28662436656 has 80 divisors (see below), whose sum is σ = 94024934400. Its totient is φ = 8189266752.

The previous prime is 28662436609. The next prime is 28662436657. The reversal of 28662436656 is 65663426682.

It is a happy number.

28662436656 is a `hidden beast` number, since 2 + 8 + 6 + 624 + 3 + 6 + 6 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (28662436657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4736136 + ... + 4742183.

It is an arithmetic number, because the mean of its divisors is an integer number (1175311680).

Almost surely, 2^28662436656 is an apocalyptic number.

It is an amenable number.

28662436656 is an abundant number, since it is smaller than the sum of its proper divisors (65362497744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28662436656 is a wasteful number, since it uses less digits than its factorization.

28662436656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9478343 (or 9478331 counting only the distinct ones).

The product of its digits is 14929920, while the sum is 54.

The spelling of 28662436656 in words is "twenty-eight billion, six hundred sixty-two million, four hundred thirty-six thousand, six hundred fifty-six".