38643854 has 4 divisors (see below), whose sum is σ = 57965784. Its totient is φ = 19321926.

The previous prime is 38643851. The next prime is 38643859. The reversal of 38643854 is 45834683.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45834683 = 1297 ⋅35339.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38643851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9660962 + ... + 9660965.

It is an arithmetic number, because the mean of its divisors is an integer number (14491446).

Almost surely, 2^38643854 is an apocalyptic number.

38643854 is a deficient number, since it is larger than the sum of its proper divisors (19321930).

38643854 is a wasteful number, since it uses less digits than its factorization.

38643854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19321929.

The product of its digits is 276480, while the sum is 41.

The square root of 38643854 is about 6216.4181004820. The cubic root of 38643854 is about 338.0857070563.

The spelling of 38643854 in words is "thirty-eight million, six hundred forty-three thousand, eight hundred fifty-four".