39972705 has 8 divisors (see below), whose sum is σ = 63956352. Its totient is φ = 21318768.

The previous prime is 39972703. The next prime is 39972719. The reversal of 39972705 is 50727993.

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

It is not a de Polignac number, because 39972705 - 2¹ = 39972703 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39972703) 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, 1332409 + ... + 1332438.

It is an arithmetic number, because the mean of its divisors is an integer number (7994544).

Almost surely, 2^39972705 is an apocalyptic number.

It is an amenable number.

39972705 is a deficient number, since it is larger than the sum of its proper divisors (23983647).

39972705 is a wasteful number, since it uses less digits than its factorization.

39972705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2664855.

The product of its (nonzero) digits is 119070, while the sum is 42.

The square root of 39972705 is about 6322.3970928755. The cubic root of 39972705 is about 341.9173819789.

The spelling of 39972705 in words is "thirty-nine million, nine hundred seventy-two thousand, seven hundred five".