381647700 has 360 divisors, whose sum is σ = 1451907072. Its totient is φ = 84913920.

The previous prime is 381647681. The next prime is 381647719. The reversal of 381647700 is 7746183.

381647700 is a `hidden beast` number, since 3 + 8 + 1 + 647 + 7 + 0 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (381647681) and next prime (381647719).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 3005037 + ... + 3005163.

Almost surely, 2^381647700 is an apocalyptic number.

381647700 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 381647700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (725953536).

381647700 is an abundant number, since it is smaller than the sum of its proper divisors (1070259372).

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

381647700 is a wasteful number, since it uses less digits than its factorization.

381647700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 381647700 is about 19535.8055887133. The cubic root of 381647700 is about 725.3610251068.

The spelling of 381647700 in words is "three hundred eighty-one million, six hundred forty-seven thousand, seven hundred".