381878500 has 24 divisors (see below), whose sum is σ = 834023736. Its totient is φ = 152751200.

The previous prime is 381878489. The next prime is 381878501. The reversal of 381878500 is 5878183.

It can be written as a sum of positive squares in 4 ways, for example, as 99840064 + 282038436 = 9992^2 + 16794^2 .

It is not an unprimeable number, because it can be changed into a prime (381878501) 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 7 ways as a sum of consecutive naturals, for example, 381379 + ... + 382378.

It is an arithmetic number, because the mean of its divisors is an integer number (34750989).

Almost surely, 2^381878500 is an apocalyptic number.

It is an amenable number.

381878500 is an abundant number, since it is smaller than the sum of its proper divisors (452145236).

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

381878500 is a wasteful number, since it uses less digits than its factorization.

381878500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763776 (or 763764 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 381878500 is about 19541.7117981000. The cubic root of 381878500 is about 725.5072154183.

The spelling of 381878500 in words is "three hundred eighty-one million, eight hundred seventy-eight thousand, five hundred".