39979670 has 8 divisors (see below), whose sum is σ = 71963424. Its totient is φ = 15991864.

The previous prime is 39979627. The next prime is 39979673. The reversal of 39979670 is 7697993.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39979673) 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, 1998974 + ... + 1998993.

It is an arithmetic number, because the mean of its divisors is an integer number (8995428).

Almost surely, 2^39979670 is an apocalyptic number.

39979670 is a deficient number, since it is larger than the sum of its proper divisors (31983754).

39979670 is a wasteful number, since it uses less digits than its factorization.

39979670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3997974.

The product of its (nonzero) digits is 642978, while the sum is 50.

The square root of 39979670 is about 6322.9478884457. The cubic root of 39979670 is about 341.9372398316.

The spelling of 39979670 in words is "thirty-nine million, nine hundred seventy-nine thousand, six hundred seventy".