38634820 has 24 divisors (see below), whose sum is σ = 92723904. Its totient is φ = 13246176.

The previous prime is 38634787. The next prime is 38634821. The reversal of 38634820 is 2843683.

It is not an unprimeable number, because it can be changed into a prime (38634821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137842 + ... + 138121.

It is an arithmetic number, because the mean of its divisors is an integer number (3863496).

Almost surely, 2^38634820 is an apocalyptic number.

It is an amenable number.

38634820 is an abundant number, since it is smaller than the sum of its proper divisors (54089084).

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

38634820 is a wasteful number, since it uses less digits than its factorization.

38634820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275979 (or 275977 counting only the distinct ones).

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

The square root of 38634820 is about 6215.6914337827. The cubic root of 38634820 is about 338.0593595780.

The spelling of 38634820 in words is "thirty-eight million, six hundred thirty-four thousand, eight hundred twenty".