728261977982 has 32 divisors (see below), whose sum is σ = 1362627048960. Its totient is φ = 283596230880.

The previous prime is 728261977981. The next prime is 728261978009. The reversal of 728261977982 is 289779162827.

It is a Smith number, since the sum of its digits (68) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728261977981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 876482 + ... + 1491557.

It is an arithmetic number, because the mean of its divisors is an integer number (42582095280).

Almost surely, 2^728261977982 is an apocalyptic number.

728261977982 is a deficient number, since it is larger than the sum of its proper divisors (634365070978).

728261977982 is a wasteful number, since it uses less digits than its factorization.

728261977982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2370056.

The product of its digits is 85349376, while the sum is 68.

The spelling of 728261977982 in words is "seven hundred twenty-eight billion, two hundred sixty-one million, nine hundred seventy-seven thousand, nine hundred eighty-two".