38684429 has 4 divisors (see below), whose sum is σ = 44210784. Its totient is φ = 33158076.

The previous prime is 38684389. The next prime is 38684467. The reversal of 38684429 is 92448683.

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, and also an emirpimes, since its reverse is a distinct semiprime: 92448683 = 4447 ⋅20789.

It is not a de Polignac number, because 38684429 - 2²⁰ = 37635853 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38684429.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38684029) 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, 2763167 + ... + 2763180.

It is an arithmetic number, because the mean of its divisors is an integer number (11052696).

Almost surely, 2^38684429 is an apocalyptic number.

It is an amenable number.

38684429 is a deficient number, since it is larger than the sum of its proper divisors (5526355).

38684429 is an equidigital number, since it uses as much as digits as its factorization.

38684429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5526354.

The product of its digits is 331776, while the sum is 44.

The square root of 38684429 is about 6219.6807795899. The cubic root of 38684429 is about 338.2039926121.

The spelling of 38684429 in words is "thirty-eight million, six hundred eighty-four thousand, four hundred twenty-nine".