381031326720 has 1408 divisors, whose sum is σ = 1562034585600. Its totient is φ = 87234969600.

The previous prime is 381031326703. The next prime is 381031326749. The reversal of 381031326720 is 27623130183.

381031326720 is a `hidden beast` number, since 3 + 81 + 0 + 313 + 267 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1408).

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

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2781250492 + ... + 2781250628.

Almost surely, 2^381031326720 is an apocalyptic number.

381031326720 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 381031326720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (781017292800).

381031326720 is an abundant number, since it is smaller than the sum of its proper divisors (1181003258880).

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

381031326720 is a wasteful number, since it uses less digits than its factorization.

381031326720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272 (or 248 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The spelling of 381031326720 in words is "three hundred eighty-one billion, thirty-one million, three hundred twenty-six thousand, seven hundred twenty".