39504481 has 4 divisors (see below), whose sum is σ = 41828292. Its totient is φ = 37180672.

The previous prime is 39504457. The next prime is 39504499. The reversal of 39504481 is 18440593.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18440593 = 43 ⋅428851.

It can be written as a sum of positive squares in 2 ways, for example, as 33744481 + 5760000 = 5809^2 + 2400^2 .

It is a cyclic number.

It is not a de Polignac number, because 39504481 - 2⁵ = 39504449 is a prime.

It is a super-2 number, since 2×39504481² = 3121208038158722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39504181) 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, 1161880 + ... + 1161913.

It is an arithmetic number, because the mean of its divisors is an integer number (10457073).

Almost surely, 2^39504481 is an apocalyptic number.

It is an amenable number.

39504481 is a deficient number, since it is larger than the sum of its proper divisors (2323811).

39504481 is a wasteful number, since it uses less digits than its factorization.

39504481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2323810.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 39504481 is about 6285.2590240976. The cubic root of 39504481 is about 340.5771081111.

The spelling of 39504481 in words is "thirty-nine million, five hundred four thousand, four hundred eighty-one".