39971628988 has 24 divisors (see below), whose sum is σ = 70208604144. Its totient is φ = 19912147200.

The previous prime is 39971628971. The next prime is 39971629043. The reversal of 39971628988 is 88982617993.

It is a super-2 number, since 2×39971628988² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1384743 + ... + 1413313.

It is an arithmetic number, because the mean of its divisors is an integer number (2925358506).

Almost surely, 2^39971628988 is an apocalyptic number.

It is an amenable number.

39971628988 is a deficient number, since it is larger than the sum of its proper divisors (30236975156).

39971628988 is a wasteful number, since it uses less digits than its factorization.

39971628988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29853 (or 29851 counting only the distinct ones).

The product of its digits is 94058496, while the sum is 70.

The spelling of 39971628988 in words is "thirty-nine billion, nine hundred seventy-one million, six hundred twenty-eight thousand, nine hundred eighty-eight".