38644620 has 96 divisors (see below), whose sum is σ = 125024256. Its totient is φ = 8736000.

The previous prime is 38644609. The next prime is 38644633. The reversal of 38644620 is 2644683.

38644620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 in 31 ways as a sum of consecutive naturals, for example, 41965 + ... + 42875.

It is an arithmetic number, because the mean of its divisors is an integer number (1302336).

Almost surely, 2^38644620 is an apocalyptic number.

38644620 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38644620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62512128).

38644620 is an abundant number, since it is smaller than the sum of its proper divisors (86379636).

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

38644620 is a wasteful number, since it uses less digits than its factorization.

38644620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031 (or 1029 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 38644620 is about 6216.4797112192. The cubic root of 38644620 is about 338.0879408910.

The spelling of 38644620 in words is "thirty-eight million, six hundred forty-four thousand, six hundred twenty".