38645620 has 48 divisors (see below), whose sum is σ = 92010240. Its totient is φ = 13516416.

The previous prime is 38645599. The next prime is 38645647. The reversal of 38645620 is 2654683.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1029 + ... + 8851.

It is an arithmetic number, because the mean of its divisors is an integer number (1916880).

Almost surely, 2^38645620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38645620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46005120).

38645620 is an abundant number, since it is smaller than the sum of its proper divisors (53364620).

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

38645620 is a wasteful number, since it uses less digits than its factorization.

38645620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7864 (or 7862 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 38645620 is about 6216.5601420721. The cubic root of 38645620 is about 338.0908570798.

The spelling of 38645620 in words is "thirty-eight million, six hundred forty-five thousand, six hundred twenty".