39621944 has 8 divisors (see below), whose sum is σ = 74291160. Its totient is φ = 19810968.

The previous prime is 39621941. The next prime is 39621979. The reversal of 39621944 is 44912693.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 39621898 and 39621907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39621941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2476364 + ... + 2476379.

It is an arithmetic number, because the mean of its divisors is an integer number (9286395).

Almost surely, 2^39621944 is an apocalyptic number.

It is an amenable number.

39621944 is a deficient number, since it is larger than the sum of its proper divisors (34669216).

39621944 is a wasteful number, since it uses less digits than its factorization.

39621944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4952749 (or 4952745 counting only the distinct ones).

The product of its digits is 46656, while the sum is 38.

The square root of 39621944 is about 6294.5964127972. The cubic root of 39621944 is about 340.9143325018.

The spelling of 39621944 in words is "thirty-nine million, six hundred twenty-one thousand, nine hundred forty-four".