728670371881 has 8 divisors (see below), whose sum is σ = 743078929824. Its totient is φ = 714395847360.

The previous prime is 728670371879. The next prime is 728670371909. The reversal of 728670371881 is 188173076827.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 728670371881 - 2¹ = 728670371879 is a prime.

It is a super-2 number, since 2×728670371881² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728670171881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33497376 + ... + 33519121.

It is an arithmetic number, because the mean of its divisors is an integer number (92884866228).

Almost surely, 2^728670371881 is an apocalyptic number.

It is an amenable number.

728670371881 is a deficient number, since it is larger than the sum of its proper divisors (14408557943).

728670371881 is a wasteful number, since it uses less digits than its factorization.

728670371881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67016711.

The product of its (nonzero) digits is 6322176, while the sum is 58.

The spelling of 728670371881 in words is "seven hundred twenty-eight billion, six hundred seventy million, three hundred seventy-one thousand, eight hundred eighty-one".