39770 has 16 divisors (see below), whose sum is σ = 74088. Its totient is φ = 15360.

The previous prime is 39769. The next prime is 39779. The reversal of 39770 is 7793.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20449 + 19321 = 143^2 + 139^2 .

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (39779) 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, 362 + ... + 458.

2³⁹⁷⁷⁰ is an apocalyptic number.

39770 is a deficient number, since it is larger than the sum of its proper divisors (34318).

39770 is a wasteful number, since it uses less digits than its factorization.

39770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145.

The product of its (nonzero) digits is 1323, while the sum is 26.

The square root of 39770 is about 199.4241710526. The cubic root of 39770 is about 34.1338438170.

The spelling of 39770 in words is "thirty-nine thousand, seven hundred seventy".