381487860 has 192 divisors, whose sum is σ = 1320130560. Its totient is φ = 90823680.

The previous prime is 381487859. The next prime is 381487877. The reversal of 381487860 is 68784183.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 216744 + ... + 218496.

It is an arithmetic number, because the mean of its divisors is an integer number (6875680).

Almost surely, 2^381487860 is an apocalyptic number.

381487860 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 381487860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (660065280).

381487860 is an abundant number, since it is smaller than the sum of its proper divisors (938642700).

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

381487860 is a wasteful number, since it uses less digits than its factorization.

381487860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1815 (or 1807 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 381487860 is about 19531.7142104834. The cubic root of 381487860 is about 725.2597468022.

The spelling of 381487860 in words is "three hundred eighty-one million, four hundred eighty-seven thousand, eight hundred sixty".