728323877 has 8 divisors (see below), whose sum is σ = 789976152. Its totient is φ = 668761600.

The previous prime is 728323861. The next prime is 728323879. The reversal of 728323877 is 778323827.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 233661796 + 494662081 = 15286^2 + 22241^2 .

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 728323877 - 2⁴ = 728323861 is a prime.

It is a super-2 number, since 2×728323877² = 1060911339616622258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728323879) 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, 521774 + ... + 523167.

It is an arithmetic number, because the mean of its divisors is an integer number (98747019).

Almost surely, 2^728323877 is an apocalyptic number.

It is an amenable number.

728323877 is a deficient number, since it is larger than the sum of its proper divisors (61652275).

728323877 is a wasteful number, since it uses less digits than its factorization.

728323877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044999.

The product of its digits is 790272, while the sum is 47.

The square root of 728323877 is about 26987.4762992022. The cubic root of 728323877 is about 899.7216740186.

The spelling of 728323877 in words is "seven hundred twenty-eight million, three hundred twenty-three thousand, eight hundred seventy-seven".