721076732 has 6 divisors (see below), whose sum is σ = 1261884288. Its totient is φ = 360538364.

The previous prime is 721076729. The next prime is 721076737. The reversal of 721076732 is 237670127.

It is a junction number, because it is equal to n+sod(n) for n = 721076692 and 721076701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721076737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90134588 + ... + 90134595.

It is an arithmetic number, because the mean of its divisors is an integer number (210314048).

Almost surely, 2^721076732 is an apocalyptic number.

It is an amenable number.

721076732 is a deficient number, since it is larger than the sum of its proper divisors (540807556).

721076732 is a wasteful number, since it uses less digits than its factorization.

721076732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180269187 (or 180269185 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 35.

The square root of 721076732 is about 26852.8719506871. The cubic root of 721076732 is about 896.7275112148.

The spelling of 721076732 in words is "seven hundred twenty-one million, seventy-six thousand, seven hundred thirty-two".