67638434 has 16 divisors (see below), whose sum is σ = 103368960. Its totient is φ = 33186720.

The previous prime is 67638421. The next prime is 67638449. The reversal of 67638434 is 43483676.

It is a junction number, because it is equal to n+sod(n) for n = 67638391 and 67638400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32942 + ... + 34934.

It is an arithmetic number, because the mean of its divisors is an integer number (6460560).

Almost surely, 2^67638434 is an apocalyptic number.

67638434 is a deficient number, since it is larger than the sum of its proper divisors (35730526).

67638434 is a wasteful number, since it uses less digits than its factorization.

67638434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2305.

The product of its digits is 290304, while the sum is 41.

The square root of 67638434 is about 8224.2588723848. The cubic root of 67638434 is about 407.4407988571.

The spelling of 67638434 in words is "sixty-seven million, six hundred thirty-eight thousand, four hundred thirty-four".