381215680 has 112 divisors (see below), whose sum is σ = 950390784. Its totient is φ = 145474560.

The previous prime is 381215671. The next prime is 381215689. The reversal of 381215680 is 86512183.

It is an interprime number because it is at equal distance from previous prime (381215671) and next prime (381215689).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381215689) 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, 823129 + ... + 823591.

It is an arithmetic number, because the mean of its divisors is an integer number (8485632).

Almost surely, 2^381215680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 381215680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (475195392).

381215680 is an abundant number, since it is smaller than the sum of its proper divisors (569175104).

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

381215680 is a wasteful number, since it uses less digits than its factorization.

381215680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594 (or 584 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 381215680 is about 19524.7453248435. The cubic root of 381215680 is about 725.0872221657.

The spelling of 381215680 in words is "three hundred eighty-one million, two hundred fifteen thousand, six hundred eighty".