381816258 has 32 divisors (see below), whose sum is σ = 780779520. Its totient is φ = 124437840.

The previous prime is 381816257. The next prime is 381816269. The reversal of 381816258 is 852618183.

It is not an unprimeable number, because it can be changed into a prime (381816257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64791 + ... + 70437.

It is an arithmetic number, because the mean of its divisors is an integer number (24399360).

Almost surely, 2^381816258 is an apocalyptic number.

381816258 is an abundant number, since it is smaller than the sum of its proper divisors (398963262).

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

381816258 is a wasteful number, since it uses less digits than its factorization.

381816258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5902.

The product of its digits is 92160, while the sum is 42.

The square root of 381816258 is about 19540.1191910387. The cubic root of 381816258 is about 725.4677967082.

The spelling of 381816258 in words is "three hundred eighty-one million, eight hundred sixteen thousand, two hundred fifty-eight".