29287861872 has 20 divisors (see below), whose sum is σ = 75660309960. Its totient is φ = 9762620608.

The previous prime is 29287861871. The next prime is 29287861879. The reversal of 29287861872 is 27816878292.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29287861871) 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 3 ways as a sum of consecutive naturals, for example, 305081847 + ... + 305081942.

It is an arithmetic number, because the mean of its divisors is an integer number (3783015498).

Almost surely, 2^29287861872 is an apocalyptic number.

It is an amenable number.

29287861872 is an abundant number, since it is smaller than the sum of its proper divisors (46372448088).

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

29287861872 is a wasteful number, since it uses less digits than its factorization.

29287861872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610163800 (or 610163794 counting only the distinct ones).

The product of its digits is 10838016, while the sum is 60.

The spelling of 29287861872 in words is "twenty-nine billion, two hundred eighty-seven million, eight hundred sixty-one thousand, eight hundred seventy-two".