728822812542 has 64 divisors (see below), whose sum is σ = 1616071993344. Its totient is φ = 217265257440.

The previous prime is 728822812493. The next prime is 728822812547. The reversal of 728822812542 is 245218228827.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728822812547) 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, 3174633 + ... + 3396459.

It is an arithmetic number, because the mean of its divisors is an integer number (25251124896).

Almost surely, 2^728822812542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 728822812542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (808035996672).

728822812542 is an abundant number, since it is smaller than the sum of its proper divisors (887249180802).

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

728822812542 is a wasteful number, since it uses less digits than its factorization.

728822812542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222653.

The product of its digits is 2293760, while the sum is 51.

The spelling of 728822812542 in words is "seven hundred twenty-eight billion, eight hundred twenty-two million, eight hundred twelve thousand, five hundred forty-two".