39890722 has 4 divisors (see below), whose sum is σ = 59836086. Its totient is φ = 19945360.

The previous prime is 39890693. The next prime is 39890737. The reversal of 39890722 is 22709893.

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., 39828721 + 62001 = 6311^2 + 249^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 9972679 + ... + 9972682.

Almost surely, 2^39890722 is an apocalyptic number.

39890722 is a deficient number, since it is larger than the sum of its proper divisors (19945364).

39890722 is a wasteful number, since it uses less digits than its factorization.

39890722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19945363.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 39890722 is about 6315.9102273544. The cubic root of 39890722 is about 341.6834673740.

The spelling of 39890722 in words is "thirty-nine million, eight hundred ninety thousand, seven hundred twenty-two".