38443649 has 4 divisors (see below), whose sum is σ = 40115136. Its totient is φ = 36772164.

The previous prime is 38443621. The next prime is 38443661. The reversal of 38443649 is 94634483.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 38443649 - 2²⁰ = 37395073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38443619) 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, 835709 + ... + 835754.

It is an arithmetic number, because the mean of its divisors is an integer number (10028784).

Almost surely, 2^38443649 is an apocalyptic number.

It is an amenable number.

38443649 is a deficient number, since it is larger than the sum of its proper divisors (1671487).

38443649 is a wasteful number, since it uses less digits than its factorization.

38443649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1671486.

The product of its digits is 248832, while the sum is 41.

The square root of 38443649 is about 6200.2942672102. The cubic root of 38443649 is about 337.5008475516.

The spelling of 38443649 in words is "thirty-eight million, four hundred forty-three thousand, six hundred forty-nine".