38857780 has 48 divisors (see below), whose sum is σ = 88792704. Its totient is φ = 14198400.

The previous prime is 38857759. The next prime is 38857783. The reversal of 38857780 is 8775883.

It is a self number, because there is not a number n which added to its sum of digits gives 38857780.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38857783) 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 15 ways as a sum of consecutive naturals, for example, 26055 + ... + 27505.

It is an arithmetic number, because the mean of its divisors is an integer number (1849848).

Almost surely, 2^38857780 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 38857780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44396352).

38857780 is an abundant number, since it is smaller than the sum of its proper divisors (49934924).

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

38857780 is a wasteful number, since it uses less digits than its factorization.

38857780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1576 (or 1574 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 46.

The square root of 38857780 is about 6233.6008855236. The cubic root of 38857780 is about 338.7084216158.

The spelling of 38857780 in words is "thirty-eight million, eight hundred fifty-seven thousand, seven hundred eighty".