381658372 has 12 divisors (see below), whose sum is σ = 668044636. Its totient is φ = 190788480.

The previous prime is 381658369. The next prime is 381658421. The reversal of 381658372 is 273856183.

It can be written as a sum of positive squares in 2 ways, for example, as 76317696 + 305340676 = 8736^2 + 17474^2 .

It is a super-2 number, since 2×381658372² = 291326225835380768, which contains 22 as substring.

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, 22768 + ... + 35800.

Almost surely, 2^381658372 is an apocalyptic number.

It is an amenable number.

381658372 is a deficient number, since it is larger than the sum of its proper divisors (286386264).

381658372 is a wasteful number, since it uses less digits than its factorization.

381658372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20358 (or 20356 counting only the distinct ones).

The product of its digits is 241920, while the sum is 43.

The square root of 381658372 is about 19536.0787262951. The cubic root of 381658372 is about 725.3677861247.

The spelling of 381658372 in words is "three hundred eighty-one million, six hundred fifty-eight thousand, three hundred seventy-two".