39985570 has 8 divisors (see below), whose sum is σ = 71974044. Its totient is φ = 15994224.

The previous prime is 39985553. The next prime is 39985573. The reversal of 39985570 is 7558993.

It can be written as a sum of positive squares in 2 ways, for example, as 38105929 + 1879641 = 6173^2 + 1371^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 39985570.

It is not an unprimeable number, because it can be changed into a prime (39985573) 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, 1999269 + ... + 1999288.

Almost surely, 2^39985570 is an apocalyptic number.

39985570 is a deficient number, since it is larger than the sum of its proper divisors (31988474).

39985570 is a wasteful number, since it uses less digits than its factorization.

39985570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3998564.

The product of its (nonzero) digits is 340200, while the sum is 46.

The square root of 39985570 is about 6323.4144257671. The cubic root of 39985570 is about 341.9540594676.

The spelling of 39985570 in words is "thirty-nine million, nine hundred eighty-five thousand, five hundred seventy".