381658306 has 16 divisors (see below), whose sum is σ = 577706400. Its totient is φ = 189096768.

The previous prime is 381658271. The next prime is 381658349. The reversal of 381658306 is 603856183.

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, 122010 + ... + 125098.

It is an arithmetic number, because the mean of its divisors is an integer number (36106650).

Almost surely, 2^381658306 is an apocalyptic number.

381658306 is the 12356-th heptagonal number.

381658306 is a deficient number, since it is larger than the sum of its proper divisors (196048094).

381658306 is a wasteful number, since it uses less digits than its factorization.

381658306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3633.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 381658306 is about 19536.0770371126. The cubic root of 381658306 is about 725.3677443122.

The spelling of 381658306 in words is "three hundred eighty-one million, six hundred fifty-eight thousand, three hundred six".