3840427 has 8 divisors (see below), whose sum is σ = 3925440. Its totient is φ = 3756480.

The previous prime is 3840409. The next prime is 3840449. The reversal of 3840427 is 7240483.

3840427 is nontrivially palindromic in base 4.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3840427 is a prime.

It is a Duffinian number.

3840427 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3840395 and 3840404.

It is not an unprimeable number, because it can be changed into a prime (3840127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13527 + ... + 13807.

It is an arithmetic number, because the mean of its divisors is an integer number (490680).

Almost surely, 2^3840427 is an apocalyptic number.

3840427 is a deficient number, since it is larger than the sum of its proper divisors (85013).

3840427 is a wasteful number, since it uses less digits than its factorization.

3840427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 3840427 is about 1959.7007424604. The cubic root of 3840427 is about 156.6005097666.

The spelling of 3840427 in words is "three million, eight hundred forty thousand, four hundred twenty-seven".