4308638 has 4 divisors (see below), whose sum is σ = 6462960. Its totient is φ = 2154318.

The previous prime is 4308637. The next prime is 4308653. The reversal of 4308638 is 8368034.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8368034 = 2 ⋅4184017.

It is a super-2 number, since 2×4308638² = 37128722830088, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4308637) 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 as a sum of consecutive naturals, namely, 1077158 + ... + 1077161.

It is an arithmetic number, because the mean of its divisors is an integer number (1615740).

Almost surely, 2^4308638 is an apocalyptic number.

4308638 is a deficient number, since it is larger than the sum of its proper divisors (2154322).

4308638 is a wasteful number, since it uses less digits than its factorization.

4308638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2154321.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 4308638 is about 2075.7258971261. The cubic root of 4308638 is about 162.7221482413.

The spelling of 4308638 in words is "four million, three hundred eight thousand, six hundred thirty-eight".