38989978790 has 32 divisors (see below), whose sum is σ = 80746286400. Its totient is φ = 13278271104.

The previous prime is 38989978777. The next prime is 38989978849. The reversal of 38989978790 is 9787998983.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1858697 + ... + 1879556.

It is an arithmetic number, because the mean of its divisors is an integer number (2523321450).

Almost surely, 2^38989978790 is an apocalyptic number.

38989978790 is an abundant number, since it is smaller than the sum of its proper divisors (41756307610).

38989978790 is a wasteful number, since it uses less digits than its factorization.

38989978790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3738416.

The product of its (nonzero) digits is 493807104, while the sum is 77.

The spelling of 38989978790 in words is "thirty-eight billion, nine hundred eighty-nine million, nine hundred seventy-eight thousand, seven hundred ninety".