38389540 has 72 divisors (see below), whose sum is σ = 96066432. Its totient is φ = 12841920.

The previous prime is 38389537. The next prime is 38389573. The reversal of 38389540 is 4598383.

It is a junction number, because it is equal to n+sod(n) for n = 38389493 and 38389502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41685 + ... + 42595.

It is an arithmetic number, because the mean of its divisors is an integer number (1334256).

Almost surely, 2^38389540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38389540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48033216).

38389540 is an abundant number, since it is smaller than the sum of its proper divisors (57676892).

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

38389540 is a wasteful number, since it uses less digits than its factorization.

38389540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977 (or 968 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 38389540 is about 6195.9293088285. The cubic root of 38389540 is about 337.3424303330.

The spelling of 38389540 in words is "thirty-eight million, three hundred eighty-nine thousand, five hundred forty".