39954659440 has 20 divisors (see below), whose sum is σ = 92894583384. Its totient is φ = 15981863744.

The previous prime is 39954659429. The next prime is 39954659453. The reversal of 39954659440 is 4495645993.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×39954659440² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249716542 + ... + 249716701.

Almost surely, 2^39954659440 is an apocalyptic number.

It is an amenable number.

39954659440 is an abundant number, since it is smaller than the sum of its proper divisors (52939923944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39954659440 is a wasteful number, since it uses less digits than its factorization.

39954659440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499433256 (or 499433250 counting only the distinct ones).

The product of its (nonzero) digits is 20995200, while the sum is 58.

The spelling of 39954659440 in words is "thirty-nine billion, nine hundred fifty-four million, six hundred fifty-nine thousand, four hundred forty".