38169540 has 72 divisors (see below), whose sum is σ = 117994968. Its totient is φ = 9984000.

The previous prime is 38169517. The next prime is 38169541. The reversal of 38169540 is 4596183.

It can be written as a sum of positive squares in 4 ways, for example, as 788544 + 37380996 = 888^2 + 6114^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 38169495 and 38169504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38169541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7540 + ... + 11540.

It is an arithmetic number, because the mean of its divisors is an integer number (1638819).

Almost surely, 2^38169540 is an apocalyptic number.

38169540 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 38169540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58997484).

38169540 is an abundant number, since it is smaller than the sum of its proper divisors (79825428).

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

38169540 is a wasteful number, since it uses less digits than its factorization.

38169540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4069 (or 4064 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 38169540 is about 6178.1502085980. The cubic root of 38169540 is about 336.6967895582.

The spelling of 38169540 in words is "thirty-eight million, one hundred sixty-nine thousand, five hundred forty".