28956859439599 has 32 divisors (see below), whose sum is σ = 36389407541760. Its totient is φ = 22430504333952.

The previous prime is 28956859439587. The next prime is 28956859439611. The reversal of 28956859439599 is 99593495865982.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28956859439587) and next prime (28956859439611).

It is not a de Polignac number, because 28956859439599 - 2²³ = 28956851050991 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (91).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28956859439999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4175829 + ... + 8680510.

It is an arithmetic number, because the mean of its divisors is an integer number (1137168985680).

Almost surely, 2^{28956859439599} is an apocalyptic number.

28956859439599 is a deficient number, since it is larger than the sum of its proper divisors (7432548102161).

28956859439599 is a wasteful number, since it uses less digits than its factorization.

28956859439599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12856879.

The product of its digits is 68024448000, while the sum is 91.

The spelling of 28956859439599 in words is "twenty-eight trillion, nine hundred fifty-six billion, eight hundred fifty-nine million, four hundred thirty-nine thousand, five hundred ninety-nine".