39978603 has 48 divisors (see below), whose sum is σ = 72101120. Its totient is φ = 21625056.

The previous prime is 39978593. The next prime is 39978629. The reversal of 39978603 is 30687993.

It is a happy number.

39978603 is a `hidden beast` number, since 39 + 9 + 7 + 8 + 603 = 666.

It is not a de Polignac number, because 39978603 - 2⁶ = 39978539 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (39978683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 31701 + ... + 32937.

Almost surely, 2^39978603 is an apocalyptic number.

39978603 is a deficient number, since it is larger than the sum of its proper divisors (32122517).

39978603 is a wasteful number, since it uses less digits than its factorization.

39978603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278 (or 1266 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 39978603 is about 6322.8635126816. The cubic root of 39978603 is about 341.9341978665.

The spelling of 39978603 in words is "thirty-nine million, nine hundred seventy-eight thousand, six hundred three".