38403638388 has 36 divisors (see below), whose sum is σ = 97234281508. Its totient is φ = 12780322560.

The previous prime is 38403638369. The next prime is 38403638459. The reversal of 38403638388 is 88383630483.

It can be written as a sum of positive squares in 2 ways, for example, as 373958244 + 38029680144 = 19338^2 + 195012^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 848053 + ... + 892188.

Almost surely, 2^38403638388 is an apocalyptic number.

It is an amenable number.

38403638388 is an abundant number, since it is smaller than the sum of its proper divisors (58830643120).

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

38403638388 is a wasteful number, since it uses less digits than its factorization.

38403638388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1740864 (or 1740859 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 54.

The spelling of 38403638388 in words is "thirty-eight billion, four hundred three million, six hundred thirty-eight thousand, three hundred eighty-eight".