39937985 has 16 divisors (see below), whose sum is σ = 50068800. Its totient is φ = 30551616.

The previous prime is 39937967. The next prime is 39937987. The reversal of 39937985 is 58973993.

It is not a de Polignac number, because 39937985 - 2¹² = 39933889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39937987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9086 + ... + 12744.

It is an arithmetic number, because the mean of its divisors is an integer number (3129300).

Almost surely, 2^39937985 is an apocalyptic number.

It is an amenable number.

39937985 is a deficient number, since it is larger than the sum of its proper divisors (10130815).

39937985 is a wasteful number, since it uses less digits than its factorization.

39937985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3760.

The product of its digits is 1837080, while the sum is 53.

The square root of 39937985 is about 6319.6507023727. The cubic root of 39937985 is about 341.8183576548.

It can be divided in two parts, 3993 and 7985, that multiplied together give a triangular number (31884105 = T₇₉₈₅).

The spelling of 39937985 in words is "thirty-nine million, nine hundred thirty-seven thousand, nine hundred eighty-five".