729663540 has 48 divisors (see below), whose sum is σ = 2046343488. Its totient is φ = 194264064.

The previous prime is 729663533. The next prime is 729663587. The reversal of 729663540 is 45366927.

It is a junction number, because it is equal to n+sod(n) for n = 729663492 and 729663501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29124 + ... + 48036.

It is an arithmetic number, because the mean of its divisors is an integer number (42632156).

Almost surely, 2^729663540 is an apocalyptic number.

It is an amenable number.

729663540 is an abundant number, since it is smaller than the sum of its proper divisors (1316679948).

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

729663540 is a wasteful number, since it uses less digits than its factorization.

729663540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19568 (or 19566 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 42.

The square root of 729663540 is about 27012.2849829480. The cubic root of 729663540 is about 900.2729789228.

The spelling of 729663540 in words is "seven hundred twenty-nine million, six hundred sixty-three thousand, five hundred forty".