28449837642 has 32 divisors (see below), whose sum is σ = 57934978560. Its totient is φ = 9311122800.

The previous prime is 28449837599. The next prime is 28449837643. The reversal of 28449837642 is 24673894482.

It is not an unprimeable number, because it can be changed into a prime (28449837643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 242517 + ... + 340167.

It is an arithmetic number, because the mean of its divisors is an integer number (1810468080).

Almost surely, 2^28449837642 is an apocalyptic number.

28449837642 is an abundant number, since it is smaller than the sum of its proper divisors (29485140918).

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

28449837642 is a wasteful number, since it uses less digits than its factorization.

28449837642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98538.

The product of its digits is 18579456, while the sum is 57.

The spelling of 28449837642 in words is "twenty-eight billion, four hundred forty-nine million, eight hundred thirty-seven thousand, six hundred forty-two".