381697140 has 96 divisors (see below), whose sum is σ = 1169159040. Its totient is φ = 92275200.

The previous prime is 381697139. The next prime is 381697201. The reversal of 381697140 is 41796183.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 356526 + ... + 357594.

It is an arithmetic number, because the mean of its divisors is an integer number (12178740).

Almost surely, 2^381697140 is an apocalyptic number.

381697140 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 381697140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (584579520).

381697140 is an abundant number, since it is smaller than the sum of its proper divisors (787461900).

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

381697140 is a wasteful number, since it uses less digits than its factorization.

381697140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1633 (or 1631 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 381697140 is about 19537.0709165934. The cubic root of 381697140 is about 725.3923457031.

The spelling of 381697140 in words is "three hundred eighty-one million, six hundred ninety-seven thousand, one hundred forty".