28195043478 has 32 divisors (see below), whose sum is σ = 64450791936. Its totient is φ = 8055104448.

The previous prime is 28195043441. The next prime is 28195043479. The reversal of 28195043478 is 87434059182.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28195043478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28195043479) 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, 1034575 + ... + 1061477.

It is an arithmetic number, because the mean of its divisors is an integer number (2014087248).

Almost surely, 2^28195043478 is an apocalyptic number.

28195043478 is an abundant number, since it is smaller than the sum of its proper divisors (36255748458).

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

28195043478 is a wasteful number, since it uses less digits than its factorization.

28195043478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51868.

The product of its (nonzero) digits is 1935360, while the sum is 51.

The spelling of 28195043478 in words is "twenty-eight billion, one hundred ninety-five million, forty-three thousand, four hundred seventy-eight".