38481640 has 16 divisors (see below), whose sum is σ = 86583780. Its totient is φ = 15392640.

The previous prime is 38481623. The next prime is 38481647. The reversal of 38481640 is 4618483.

38481640 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 2 ways, for example, as 35928036 + 2553604 = 5994^2 + 1598^2 .

It is a junction number, because it is equal to n+sod(n) for n = 38481596 and 38481605.

It is not an unprimeable number, because it can be changed into a prime (38481647) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 480981 + ... + 481060.

Almost surely, 2^38481640 is an apocalyptic number.

It is an amenable number.

38481640 is an abundant number, since it is smaller than the sum of its proper divisors (48102140).

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

38481640 is a wasteful number, since it uses less digits than its factorization.

38481640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962052 (or 962048 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 38481640 is about 6203.3571556053. The cubic root of 38481640 is about 337.6119866142.

The spelling of 38481640 in words is "thirty-eight million, four hundred eighty-one thousand, six hundred forty".