728276251 has 16 divisors (see below), whose sum is σ = 795245440. Its totient is φ = 664614720.

The previous prime is 728276191. The next prime is 728276261. The reversal of 728276251 is 152672827.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 728276251 - 2²¹ = 726179099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (728276261) 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, 53536 + ... + 65746.

It is an arithmetic number, because the mean of its divisors is an integer number (49702840).

Almost surely, 2^728276251 is an apocalyptic number.

728276251 is a deficient number, since it is larger than the sum of its proper divisors (66969189).

728276251 is a wasteful number, since it uses less digits than its factorization.

728276251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12346.

The product of its digits is 94080, while the sum is 40.

The square root of 728276251 is about 26986.5939125337. The cubic root of 728276251 is about 899.7020622864.

The spelling of 728276251 in words is "seven hundred twenty-eight million, two hundred seventy-six thousand, two hundred fifty-one".