38640541 has 4 divisors (see below), whose sum is σ = 40913532. Its totient is φ = 36367552.

The previous prime is 38640527. The next prime is 38640583. The reversal of 38640541 is 14504683.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14504683 = 31 ⋅467893.

It can be written as a sum of positive squares in 2 ways, for example, as 16040025 + 22600516 = 4005^2 + 4754^2 .

It is a cyclic number.

It is not a de Polignac number, because 38640541 - 2¹⁷ = 38509469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38640521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1136470 + ... + 1136503.

It is an arithmetic number, because the mean of its divisors is an integer number (10228383).

Almost surely, 2^38640541 is an apocalyptic number.

It is an amenable number.

38640541 is a deficient number, since it is larger than the sum of its proper divisors (2272991).

38640541 is a wasteful number, since it uses less digits than its factorization.

38640541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2272990.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 38640541 is about 6216.1516229899. The cubic root of 38640541 is about 338.0760452357.

The spelling of 38640541 in words is "thirty-eight million, six hundred forty thousand, five hundred forty-one".