4156438 has 16 divisors (see below), whose sum is σ = 7325136. Its totient is φ = 1743840.

The previous prime is 4156433. The next prime is 4156441. The reversal of 4156438 is 8346514.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4156433) 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, 6981 + ... + 7552.

It is an arithmetic number, because the mean of its divisors is an integer number (457821).

Almost surely, 2^4156438 is an apocalyptic number.

4156438 is a deficient number, since it is larger than the sum of its proper divisors (3168698).

4156438 is a wasteful number, since it uses less digits than its factorization.

4156438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14559.

The product of its digits is 11520, while the sum is 31.

The square root of 4156438 is about 2038.7344113444. The cubic root of 4156438 is about 160.7831139500.

The spelling of 4156438 in words is "four million, one hundred fifty-six thousand, four hundred thirty-eight".