728205261 has 8 divisors (see below), whose sum is σ = 1109646144. Its totient is φ = 416117280.

The previous prime is 728205241. The next prime is 728205329. The reversal of 728205261 is 162502827.

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

It is not a de Polignac number, because 728205261 - 2⁶ = 728205197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728205211) 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, 17338200 + ... + 17338241.

It is an arithmetic number, because the mean of its divisors is an integer number (138705768).

Almost surely, 2^728205261 is an apocalyptic number.

It is an amenable number.

728205261 is a deficient number, since it is larger than the sum of its proper divisors (381440883).

728205261 is a wasteful number, since it uses less digits than its factorization.

728205261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34676451.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 728205261 is about 26985.2785977836. The cubic root of 728205261 is about 899.6728279930.

The spelling of 728205261 in words is "seven hundred twenty-eight million, two hundred five thousand, two hundred sixty-one".