381667530 has 32 divisors (see below), whose sum is σ = 924902784. Its totient is φ = 100789056.

The previous prime is 381667513. The next prime is 381667537. The reversal of 381667530 is 35766183.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (381667537) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 58669 + ... + 64848.

It is an arithmetic number, because the mean of its divisors is an integer number (28903212).

Almost surely, 2^381667530 is an apocalyptic number.

381667530 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

381667530 is an abundant number, since it is smaller than the sum of its proper divisors (543235254).

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

381667530 is a wasteful number, since it uses less digits than its factorization.

381667530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123630.

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 381667530 is about 19536.3131117414. The cubic root of 381667530 is about 725.3735878796.

The spelling of 381667530 in words is "three hundred eighty-one million, six hundred sixty-seven thousand, five hundred thirty".