381528292 has 12 divisors (see below), whose sum is σ = 690697980. Its totient is φ = 184186016.

The previous prime is 381528289. The next prime is 381528313. The reversal of 381528292 is 292825183.

It can be written as a sum of positive squares in 2 ways, for example, as 246364416 + 135163876 = 15696^2 + 11626^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1644403 + ... + 1644634.

It is an arithmetic number, because the mean of its divisors is an integer number (57558165).

Almost surely, 2^381528292 is an apocalyptic number.

It is an amenable number.

381528292 is a deficient number, since it is larger than the sum of its proper divisors (309169688).

381528292 is a wasteful number, since it uses less digits than its factorization.

381528292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3289070 (or 3289068 counting only the distinct ones).

The product of its digits is 69120, while the sum is 40.

The square root of 381528292 is about 19532.7492176601. The cubic root of 381528292 is about 725.2853681209.

The spelling of 381528292 in words is "three hundred eighty-one million, five hundred twenty-eight thousand, two hundred ninety-two".