729662381 has 12 divisors (see below), whose sum is σ = 863180640. Its totient is φ = 614822040.

The previous prime is 729662347. The next prime is 729662383. The reversal of 729662381 is 183266927.

It is a de Polignac number, because none of the positive numbers 2^k-729662381 is a prime.

It is a super-2 number, since 2×729662381² = 1064814380493178322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (729662383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 123305 + ... + 129086.

It is an arithmetic number, because the mean of its divisors is an integer number (71931720).

Almost surely, 2^729662381 is an apocalyptic number.

It is an amenable number.

729662381 is a deficient number, since it is larger than the sum of its proper divisors (133518259).

729662381 is a wasteful number, since it uses less digits than its factorization.

729662381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252464 (or 252457 counting only the distinct ones).

The product of its digits is 217728, while the sum is 44.

The square root of 729662381 is about 27012.2635297377. The cubic root of 729662381 is about 900.2725022570.

The spelling of 729662381 in words is "seven hundred twenty-nine million, six hundred sixty-two thousand, three hundred eighty-one".