38905429 has 4 divisors (see below), whose sum is σ = 38918880. Its totient is φ = 38891980.

The previous prime is 38905417. The next prime is 38905453. The reversal of 38905429 is 92450983.

It is a happy number.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 92450983 = 883 ⋅104701.

It is a cyclic number.

It is not a de Polignac number, because 38905429 - 2¹⁹ = 38381141 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 38905391 and 38905400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38905459) 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, 409 + ... + 8830.

It is an arithmetic number, because the mean of its divisors is an integer number (9729720).

Almost surely, 2^38905429 is an apocalyptic number.

It is an amenable number.

38905429 is a deficient number, since it is larger than the sum of its proper divisors (13451).

38905429 is an equidigital number, since it uses as much as digits as its factorization.

38905429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13450.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 38905429 is about 6237.4216628347. The cubic root of 38905429 is about 338.8468111074.

The spelling of 38905429 in words is "thirty-eight million, nine hundred five thousand, four hundred twenty-nine".