38781340 has 24 divisors (see below), whose sum is σ = 87706080. Its totient is φ = 14319168.

The previous prime is 38781317. The next prime is 38781373. The reversal of 38781340 is 4318783.

38781340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 38781296 and 38781305.

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 7 ways as a sum of consecutive naturals, for example, 74320 + ... + 74839.

It is an arithmetic number, because the mean of its divisors is an integer number (3654420).

Almost surely, 2^38781340 is an apocalyptic number.

It is an amenable number.

38781340 is an abundant number, since it is smaller than the sum of its proper divisors (48924740).

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

38781340 is a wasteful number, since it uses less digits than its factorization.

38781340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149181 (or 149179 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 38781340 is about 6227.4665795972. The cubic root of 38781340 is about 338.4861763957.

The spelling of 38781340 in words is "thirty-eight million, seven hundred eighty-one thousand, three hundred forty".