38539540 has 24 divisors (see below), whose sum is σ = 87159240. Its totient is φ = 14229888.

The previous prime is 38539517. The next prime is 38539583. The reversal of 38539540 is 4593583.

It can be written as a sum of positive squares in 4 ways, for example, as 9314704 + 29224836 = 3052^2 + 5406^2 .

It is a super-2 number, since 2×38539540² = 2970592286823200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 38539540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73855 + ... + 74374.

It is an arithmetic number, because the mean of its divisors is an integer number (3631635).

Almost surely, 2^38539540 is an apocalyptic number.

It is an amenable number.

38539540 is an abundant number, since it is smaller than the sum of its proper divisors (48619700).

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

38539540 is a wasteful number, since it uses less digits than its factorization.

38539540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148251 (or 148249 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 38539540 is about 6208.0222293416. The cubic root of 38539540 is about 337.7812269609.

The spelling of 38539540 in words is "thirty-eight million, five hundred thirty-nine thousand, five hundred forty".