28767623685 has 32 divisors (see below), whose sum is σ = 46432649088. Its totient is φ = 15208488960.

The previous prime is 28767623659. The next prime is 28767623699. The reversal of 28767623685 is 58632676782.

It is a happy number.

It is not a de Polignac number, because 28767623685 - 2²¹ = 28765526533 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 795814 + ... + 831176.

It is an arithmetic number, because the mean of its divisors is an integer number (1451020284).

Almost surely, 2^28767623685 is an apocalyptic number.

It is an amenable number.

28767623685 is a deficient number, since it is larger than the sum of its proper divisors (17665025403).

28767623685 is a wasteful number, since it uses less digits than its factorization.

28767623685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35845.

The product of its digits is 40642560, while the sum is 60.

The spelling of 28767623685 in words is "twenty-eight billion, seven hundred sixty-seven million, six hundred twenty-three thousand, six hundred eighty-five".