381212130 has 64 divisors (see below), whose sum is σ = 997839360. Its totient is φ = 92641536.

The previous prime is 381212123. The next prime is 381212141. The reversal of 381212130 is 31212183.

It is a junction number, because it is equal to n+sod(n) for n = 381212097 and 381212106.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24624 + ... + 36996.

It is an arithmetic number, because the mean of its divisors is an integer number (15591240).

Almost surely, 2^381212130 is an apocalyptic number.

381212130 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 381212130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (498919680).

381212130 is an abundant number, since it is smaller than the sum of its proper divisors (616627230).

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

381212130 is a wasteful number, since it uses less digits than its factorization.

381212130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12475.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 381212130 is about 19524.6544143552. The cubic root of 381212130 is about 725.0849714122.

The spelling of 381212130 in words is "three hundred eighty-one million, two hundred twelve thousand, one hundred thirty".