38387540 has 12 divisors (see below), whose sum is σ = 80613876. Its totient is φ = 15355008.

The previous prime is 38387527. The next prime is 38387551. The reversal of 38387540 is 4578383.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12945604 + 25441936 = 3598^2 + 5044^2 .

It is a junction number, because it is equal to n+sod(n) for n = 38387494 and 38387503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 959669 + ... + 959708.

It is an arithmetic number, because the mean of its divisors is an integer number (6717823).

Almost surely, 2^38387540 is an apocalyptic number.

It is an amenable number.

38387540 is an abundant number, since it is smaller than the sum of its proper divisors (42226336).

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

38387540 is a wasteful number, since it uses less digits than its factorization.

38387540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1919386 (or 1919384 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 38387540 is about 6195.7679104369. The cubic root of 38387540 is about 337.3365719961.

The spelling of 38387540 in words is "thirty-eight million, three hundred eighty-seven thousand, five hundred forty".