728261534 has 32 divisors (see below), whose sum is σ = 1466712576. Its totient is φ = 261911520.

The previous prime is 728261533. The next prime is 728261539. The reversal of 728261534 is 435162827.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728261533) 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, 179882 + ... + 183885.

It is an arithmetic number, because the mean of its divisors is an integer number (45834768).

Almost surely, 2^728261534 is an apocalyptic number.

728261534 is an abundant number, since it is smaller than the sum of its proper divisors (738451042).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

728261534 is a wasteful number, since it uses less digits than its factorization.

728261534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363800.

The product of its digits is 80640, while the sum is 38.

The square root of 728261534 is about 26986.3212387313. The cubic root of 728261534 is about 899.6960018551.

It can be divided in two parts, 728 and 261534, that added together give a palindrome (262262).

The spelling of 728261534 in words is "seven hundred twenty-eight million, two hundred sixty-one thousand, five hundred thirty-four".