728771632 has 10 divisors (see below), whose sum is σ = 1411995068. Its totient is φ = 364385808.

The previous prime is 728771627. The next prime is 728771633. The reversal of 728771632 is 236177827.

It is a super-2 number, since 2×728771632² = 1062216183215886848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (728771633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22774098 + ... + 22774129.

Almost surely, 2^728771632 is an apocalyptic number.

It is an amenable number.

728771632 is a deficient number, since it is larger than the sum of its proper divisors (683223436).

728771632 is a wasteful number, since it uses less digits than its factorization.

728771632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45548235 (or 45548229 counting only the distinct ones).

The product of its digits is 197568, while the sum is 43.

The square root of 728771632 is about 26995.7706317119. The cubic root of 728771632 is about 899.9060115842.

The spelling of 728771632 in words is "seven hundred twenty-eight million, seven hundred seventy-one thousand, six hundred thirty-two".