728255734740 has 96 divisors (see below), whose sum is σ = 2293656059520. Its totient is φ = 194201517600.

The previous prime is 728255734673. The next prime is 728255734747. The reversal of 728255734740 is 47437552827.

It is a happy number.

728255734740 is a `hidden beast` number, since 7 + 2 + 8 + 2 + 557 + 3 + 47 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728255734747) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8281086 + ... + 8368565.

It is an arithmetic number, because the mean of its divisors is an integer number (23892250620).

Almost surely, 2^728255734740 is an apocalyptic number.

It is an amenable number.

728255734740 is an abundant number, since it is smaller than the sum of its proper divisors (1565400324780).

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

728255734740 is a wasteful number, since it uses less digits than its factorization.

728255734740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16649681 (or 16649661 counting only the distinct ones).

The product of its (nonzero) digits is 13171200, while the sum is 54.

The spelling of 728255734740 in words is "seven hundred twenty-eight billion, two hundred fifty-five million, seven hundred thirty-four thousand, seven hundred forty".