38781600 has 288 divisors, whose sum is σ = 149615424. Its totient is φ = 8601600.

The previous prime is 38781599. The next prime is 38781601. The reversal of 38781600 is 618783.

It is an interprime number because it is at equal distance from previous prime (38781599) and next prime (38781601).

It is a super-3 number, since 3×38781600³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (38781601) 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 47 ways as a sum of consecutive naturals, for example, 343144 + ... + 343256.

It is an arithmetic number, because the mean of its divisors is an integer number (519498).

Almost surely, 2^38781600 is an apocalyptic number.

38781600 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 38781600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74807712).

38781600 is an abundant number, since it is smaller than the sum of its proper divisors (110833824).

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

38781600 is a wasteful number, since it uses less digits than its factorization.

38781600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 38781600 is about 6227.4874548248. The cubic root of 38781600 is about 338.4869328266.

The spelling of 38781600 in words is "thirty-eight million, seven hundred eighty-one thousand, six hundred".