39779946 has 12 divisors (see below), whose sum is σ = 86189922. Its totient is φ = 13259976.

The previous prime is 39779941. The next prime is 39779947. The reversal of 39779946 is 64997793.

It can be written as a sum of positive squares in only one way, i.e., 38303721 + 1476225 = 6189^2 + 1215^2 .

It is a junction number, because it is equal to n+sod(n) for n = 39779892 and 39779901.

It is not an unprimeable number, because it can be changed into a prime (39779941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1104981 + ... + 1105016.

Almost surely, 2^39779946 is an apocalyptic number.

39779946 is an abundant number, since it is smaller than the sum of its proper divisors (46409976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39779946 is a wasteful number, since it uses less digits than its factorization.

39779946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2210005 (or 2210002 counting only the distinct ones).

The product of its digits is 2571912, while the sum is 54.

The square root of 39779946 is about 6307.1345316237. The cubic root of 39779946 is about 341.3668906810.

The spelling of 39779946 in words is "thirty-nine million, seven hundred seventy-nine thousand, nine hundred forty-six".