39953990 has 16 divisors (see below), whose sum is σ = 75044448. Its totient is φ = 15286656.

The previous prime is 39953987. The next prime is 39953993. The reversal of 39953990 is 9935993.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (39953987) and next prime (39953993).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39953993) 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 7 ways as a sum of consecutive naturals, for example, 86627 + ... + 87086.

It is an arithmetic number, because the mean of its divisors is an integer number (4690278).

Almost surely, 2^39953990 is an apocalyptic number.

39953990 is a deficient number, since it is larger than the sum of its proper divisors (35090458).

39953990 is a wasteful number, since it uses less digits than its factorization.

39953990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173743.

The product of its (nonzero) digits is 295245, while the sum is 47.

The square root of 39953990 is about 6320.9168638735. The cubic root of 39953990 is about 341.8640123715.

The spelling of 39953990 in words is "thirty-nine million, nine hundred fifty-three thousand, nine hundred ninety".