39729044 has 12 divisors (see below), whose sum is σ = 70505568. Its totient is φ = 19584600.

The previous prime is 39729037. The next prime is 39729047. The reversal of 39729044 is 44092793.

It is a junction number, because it is equal to n+sod(n) for n = 39728989 and 39729007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39729047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69662 + ... + 70229.

It is an arithmetic number, because the mean of its divisors is an integer number (5875464).

Almost surely, 2^39729044 is an apocalyptic number.

It is an amenable number.

39729044 is a deficient number, since it is larger than the sum of its proper divisors (30776524).

39729044 is a wasteful number, since it uses less digits than its factorization.

39729044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139966 (or 139964 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 39729044 is about 6303.0979684596. The cubic root of 39729044 is about 341.2212253732.

The spelling of 39729044 in words is "thirty-nine million, seven hundred twenty-nine thousand, forty-four".