728767632 has 40 divisors (see below), whose sum is σ = 1883768320. Its totient is φ = 242778240.

The previous prime is 728767609. The next prime is 728767717. The reversal of 728767632 is 236767827.

It is a super-2 number, since 2×728767632² = 1062204522901774848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104082 + ... + 110862.

It is an arithmetic number, because the mean of its divisors is an integer number (47094208).

Almost surely, 2^728767632 is an apocalyptic number.

It is an amenable number.

728767632 is an abundant number, since it is smaller than the sum of its proper divisors (1155000688).

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

728767632 is a wasteful number, since it uses less digits than its factorization.

728767632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9031 (or 9025 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 48.

The square root of 728767632 is about 26995.6965459312. The cubic root of 728767632 is about 899.9043651468.

It can be divided in two parts, 72876 and 7632, that added together give a palindrome (80508).

The spelling of 728767632 in words is "seven hundred twenty-eight million, seven hundred sixty-seven thousand, six hundred thirty-two".