39780044 has 24 divisors (see below), whose sum is σ = 71194368. Its totient is φ = 19443600.

The previous prime is 39780043. The next prime is 39780049. The reversal of 39780044 is 44008793.

It is a junction number, because it is equal to n+sod(n) for n = 39779986 and 39780013.

It is not an unprimeable number, because it can be changed into a prime (39780043) 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 7 ways as a sum of consecutive naturals, for example, 39977 + ... + 40959.

It is an arithmetic number, because the mean of its divisors is an integer number (2966432).

Almost surely, 2^39780044 is an apocalyptic number.

It is an amenable number.

39780044 is a deficient number, since it is larger than the sum of its proper divisors (31414324).

39780044 is a wasteful number, since it uses less digits than its factorization.

39780044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1205 (or 1203 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 39780044 is about 6307.1423005986. The cubic root of 39780044 is about 341.3671710059.

The spelling of 39780044 in words is "thirty-nine million, seven hundred eighty thousand, forty-four".