38919191090 has 16 divisors (see below), whose sum is σ = 75443355288. Its totient is φ = 14370162816.

The previous prime is 38919191057. The next prime is 38919191093. The reversal of 38919191090 is 9019191983.

38919191090 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 24480044521 + 14439146569 = 156461^2 + 120163^2 .

It is not an unprimeable number, because it can be changed into a prime (38919191093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149689067 + ... + 149689326.

Almost surely, 2^38919191090 is an apocalyptic number.

38919191090 is a deficient number, since it is larger than the sum of its proper divisors (36524164198).

38919191090 is a wasteful number, since it uses less digits than its factorization.

38919191090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299378413.

The product of its (nonzero) digits is 157464, while the sum is 50.

The spelling of 38919191090 in words is "thirty-eight billion, nine hundred nineteen million, one hundred ninety-one thousand, ninety".