728432514 has 20 divisors (see below), whose sum is σ = 1632228774. Its totient is φ = 242810784.

The previous prime is 728432501. The next prime is 728432531. The reversal of 728432514 is 415234827.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 537080625 + 191351889 = 23175^2 + 13833^2 .

It is a super-2 number, since 2×728432514² = 1061227854904720392, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2248087 + ... + 2248410.

Almost surely, 2^728432514 is an apocalyptic number.

728432514 is an abundant number, since it is smaller than the sum of its proper divisors (903796260).

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

728432514 is a wasteful number, since it uses less digits than its factorization.

728432514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4496511 (or 4496502 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 728432514 is about 26989.4889540354. The cubic root of 728432514 is about 899.7664060429.

It can be divided in two parts, 72843 and 2514, that added together give a palindrome (75357).

The spelling of 728432514 in words is "seven hundred twenty-eight million, four hundred thirty-two thousand, five hundred fourteen".