381321486 has 128 divisors (see below), whose sum is σ = 1058211840. Its totient is φ = 99097344.

The previous prime is 381321467. The next prime is 381321491. The reversal of 381321486 is 684123183.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 381321486.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 358191 + ... + 359253.

It is an arithmetic number, because the mean of its divisors is an integer number (8267280).

Almost surely, 2^381321486 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 381321486, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (529105920).

381321486 is an abundant number, since it is smaller than the sum of its proper divisors (676890354).

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

381321486 is a wasteful number, since it uses less digits than its factorization.

381321486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1167 (or 1161 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 381321486 is about 19527.4546728446. The cubic root of 381321486 is about 725.1542983521.

The spelling of 381321486 in words is "three hundred eighty-one million, three hundred twenty-one thousand, four hundred eighty-six".