28657134906 has 32 divisors (see below), whose sum is σ = 60768646848. Its totient is φ = 8978184960.

The previous prime is 28657134851. The next prime is 28657134907. The reversal of 28657134906 is 60943175682.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (28657134907) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 116880 + ... + 266411.

It is an arithmetic number, because the mean of its divisors is an integer number (1899020214).

It is a 1-persistent number, because it is pandigital, but 2⋅28657134906 = 57314269812 is not.

Almost surely, 2^28657134906 is an apocalyptic number.

28657134906 is an abundant number, since it is smaller than the sum of its proper divisors (32111511942).

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

28657134906 is a wasteful number, since it uses less digits than its factorization.

28657134906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384046.

The product of its (nonzero) digits is 2177280, while the sum is 51.

The spelling of 28657134906 in words is "twenty-eight billion, six hundred fifty-seven million, one hundred thirty-four thousand, nine hundred six".