38620660 has 48 divisors (see below), whose sum is σ = 88376400. Its totient is φ = 14091264.

The previous prime is 38620619. The next prime is 38620667. The reversal of 38620660 is 6602683.

It can be written as a sum of positive squares in 8 ways, for example, as 6290064 + 32330596 = 2508^2 + 5686^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38620667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22306 + ... + 23974.

It is an arithmetic number, because the mean of its divisors is an integer number (1841175).

Almost surely, 2^38620660 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 38620660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44188200).

38620660 is an abundant number, since it is smaller than the sum of its proper divisors (49755740).

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

38620660 is a wasteful number, since it uses less digits than its factorization.

38620660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1780 (or 1778 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 38620660 is about 6214.5522767131. The cubic root of 38620660 is about 338.0180539590.

The spelling of 38620660 in words is "thirty-eight million, six hundred twenty thousand, six hundred sixty".