381502985 has 8 divisors (see below), whose sum is σ = 459102600. Its totient is φ = 304336384.

The previous prime is 381502973. The next prime is 381502993. The reversal of 381502985 is 589205183.

It can be written as a sum of positive squares in 4 ways, for example, as 1408969 + 380094016 = 1187^2 + 19496^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 381502985 - 2⁴ = 381502969 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106310 + ... + 109839.

It is an arithmetic number, because the mean of its divisors is an integer number (57387825).

Almost surely, 2^381502985 is an apocalyptic number.

It is an amenable number.

381502985 is a deficient number, since it is larger than the sum of its proper divisors (77599615).

381502985 is a wasteful number, since it uses less digits than its factorization.

381502985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216507.

The product of its (nonzero) digits is 86400, while the sum is 41.

The square root of 381502985 is about 19532.1013974431. The cubic root of 381502985 is about 725.2693315622.

The spelling of 381502985 in words is "three hundred eighty-one million, five hundred two thousand, nine hundred eighty-five".