38865540 has 192 divisors, whose sum is σ = 132991488. Its totient is φ = 8294400.

The previous prime is 38865521. The next prime is 38865611. The reversal of 38865540 is 4556883.

It is a happy number.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 637110 + ... + 637170.

It is an arithmetic number, because the mean of its divisors is an integer number (692664).

Almost surely, 2^38865540 is an apocalyptic number.

38865540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38865540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66495744).

38865540 is an abundant number, since it is smaller than the sum of its proper divisors (94125948).

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

38865540 is a wasteful number, since it uses less digits than its factorization.

38865540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 39.

The square root of 38865540 is about 6234.2232876277. The cubic root of 38865540 is about 338.7309671001.

The spelling of 38865540 in words is "thirty-eight million, eight hundred sixty-five thousand, five hundred forty".