728672953 has 4 divisors (see below), whose sum is σ = 733314340. Its totient is φ = 724031568.

The previous prime is 728672947. The next prime is 728672963. The reversal of 728672953 is 359276827.

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

It can be written as a sum of positive squares in 2 ways, for example, as 461906064 + 266766889 = 21492^2 + 16333^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-728672953 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 728672897 and 728672906.

It is not an unprimeable number, because it can be changed into a prime (728672963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2320458 + ... + 2320771.

It is an arithmetic number, because the mean of its divisors is an integer number (183328585).

Almost surely, 2^728672953 is an apocalyptic number.

It is an amenable number.

728672953 is a deficient number, since it is larger than the sum of its proper divisors (4641387).

728672953 is a wasteful number, since it uses less digits than its factorization.

728672953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4641386.

The product of its digits is 1270080, while the sum is 49.

The square root of 728672953 is about 26993.9428946569. The cubic root of 728672953 is about 899.8653926258.

It can be divided in two parts, 72 and 8672953, that added together give a square (8673025 = 2945²).

The spelling of 728672953 in words is "seven hundred twenty-eight million, six hundred seventy-two thousand, nine hundred fifty-three".