2038640729 has 8 divisors (see below), whose sum is σ = 2047325280. Its totient is φ = 2029975200.

The previous prime is 2038640713. The next prime is 2038640743. The reversal of 2038640729 is 9270468302.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2038640729 - 2⁴ = 2038640713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2038640759) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234989 + ... + 243509.

It is an arithmetic number, because the mean of its divisors is an integer number (255915660).

Almost surely, 2^2038640729 is an apocalyptic number.

It is an amenable number.

2038640729 is a deficient number, since it is larger than the sum of its proper divisors (8684551).

2038640729 is an equidigital number, since it uses as much as digits as its factorization.

2038640729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9511.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 2038640729 is about 45151.3092722681. The cubic root of 2038640729 is about 1267.9833928653.

The spelling of 2038640729 in words is "two billion, thirty-eight million, six hundred forty thousand, seven hundred twenty-nine".