39978962 has 4 divisors (see below), whose sum is σ = 59968446. Its totient is φ = 19989480.

The previous prime is 39978959. The next prime is 39979001. The reversal of 39978962 is 26987993.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 35772361 + 4206601 = 5981^2 + 2051^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 9994739 + ... + 9994742.

Almost surely, 2^39978962 is an apocalyptic number.

39978962 is a deficient number, since it is larger than the sum of its proper divisors (19989484).

39978962 is a wasteful number, since it uses less digits than its factorization.

39978962 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19989483.

The product of its digits is 1469664, while the sum is 53.

The square root of 39978962 is about 6322.8919016539. The cubic root of 39978962 is about 341.9352213641.

The spelling of 39978962 in words is "thirty-nine million, nine hundred seventy-eight thousand, nine hundred sixty-two".