728902640771854 has 4 divisors (see below), whose sum is σ = 1093353961157784. Its totient is φ = 364451320385926.

The previous prime is 728902640771821. The next prime is 728902640771857. The reversal of 728902640771854 is 458177046209827.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728902640771857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 182225660192962 + ... + 182225660192965.

It is an arithmetic number, because the mean of its divisors is an integer number (273338490289446).

Almost surely, 2^{728902640771854} is an apocalyptic number.

728902640771854 is a deficient number, since it is larger than the sum of its proper divisors (364451320385930).

728902640771854 is a wasteful number, since it uses less digits than its factorization.

728902640771854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364451320385929.

The product of its (nonzero) digits is 379330560, while the sum is 70.

The spelling of 728902640771854 in words is "seven hundred twenty-eight trillion, nine hundred two billion, six hundred forty million, seven hundred seventy-one thousand, eight hundred fifty-four".