38435521 has 4 divisors (see below), whose sum is σ = 40696452. Its totient is φ = 36174592.

The previous prime is 38435497. The next prime is 38435533. The reversal of 38435521 is 12553483.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21715600 + 16719921 = 4660^2 + 4089^2 .

It is a cyclic number.

It is not a de Polignac number, because 38435521 - 2⁷ = 38435393 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38435561) 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, 1130440 + ... + 1130473.

It is an arithmetic number, because the mean of its divisors is an integer number (10174113).

Almost surely, 2^38435521 is an apocalyptic number.

It is an amenable number.

38435521 is a deficient number, since it is larger than the sum of its proper divisors (2260931).

38435521 is a wasteful number, since it uses less digits than its factorization.

38435521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2260930.

The product of its digits is 14400, while the sum is 31.

The square root of 38435521 is about 6199.6387798000. The cubic root of 38435521 is about 337.4770603521.

The spelling of 38435521 in words is "thirty-eight million, four hundred thirty-five thousand, five hundred twenty-one".