381527780 has 12 divisors (see below), whose sum is σ = 801208380. Its totient is φ = 152611104.

The previous prime is 381527767. The next prime is 381527791. The reversal of 381527780 is 87725183.

It can be written as a sum of positive squares in 2 ways, for example, as 204318436 + 177209344 = 14294^2 + 13312^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9538175 + ... + 9538214.

It is an arithmetic number, because the mean of its divisors is an integer number (66767365).

Almost surely, 2^381527780 is an apocalyptic number.

It is an amenable number.

381527780 is an abundant number, since it is smaller than the sum of its proper divisors (419680600).

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

381527780 is a wasteful number, since it uses less digits than its factorization.

381527780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19076398 (or 19076396 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 41.

The square root of 381527780 is about 19532.7361114617. The cubic root of 381527780 is about 725.2850436834.

The spelling of 381527780 in words is "three hundred eighty-one million, five hundred twenty-seven thousand, seven hundred eighty".