721952032 has 12 divisors (see below), whose sum is σ = 1421343126. Its totient is φ = 360976000.

The previous prime is 721952003. The next prime is 721952047. The reversal of 721952032 is 230259127.

It can be written as a sum of positive squares in only one way, i.e., 682463376 + 39488656 = 26124^2 + 6284^2 .

It is a junction number, because it is equal to n+sod(n) for n = 721951985 and 721952003.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11280469 + ... + 11280532.

Almost surely, 2^721952032 is an apocalyptic number.

It is an amenable number.

721952032 is a deficient number, since it is larger than the sum of its proper divisors (699391094).

721952032 is a wasteful number, since it uses less digits than its factorization.

721952032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22561011 (or 22561003 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 721952032 is about 26869.1650782081. The cubic root of 721952032 is about 897.0902041046.

The spelling of 721952032 in words is "seven hundred twenty-one million, nine hundred fifty-two thousand, thirty-two".