38823640 has 32 divisors (see below), whose sum is σ = 87576480. Its totient is φ = 15489792.

The previous prime is 38823607. The next prime is 38823641. The reversal of 38823640 is 4632883.

It is a junction number, because it is equal to n+sod(n) for n = 38823596 and 38823605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38823641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18484 + ... + 20476.

It is an arithmetic number, because the mean of its divisors is an integer number (2736765).

Almost surely, 2^38823640 is an apocalyptic number.

It is an amenable number.

38823640 is an abundant number, since it is smaller than the sum of its proper divisors (48752840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38823640 is a wasteful number, since it uses less digits than its factorization.

38823640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2491 (or 2487 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 38823640 is about 6230.8618986461. The cubic root of 38823640 is about 338.6091974391.

The spelling of 38823640 in words is "thirty-eight million, eight hundred twenty-three thousand, six hundred forty".