381704220 has 36 divisors (see below), whose sum is σ = 1157836680. Its totient is φ = 101787744.

The previous prime is 381704189. The next prime is 381704227. The reversal of 381704220 is 22407183.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×381704220² = 291396223131616800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381704227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1060110 + ... + 1060469.

It is an arithmetic number, because the mean of its divisors is an integer number (32162130).

Almost surely, 2^381704220 is an apocalyptic number.

381704220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

381704220 is an abundant number, since it is smaller than the sum of its proper divisors (776132460).

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

381704220 is a wasteful number, since it uses less digits than its factorization.

381704220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2120594 (or 2120589 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 381704220 is about 19537.2521097518. The cubic root of 381704220 is about 725.3968307128.

It can be divided in two parts, 381704 and 220, that added together give a square (381924 = 618²).

The spelling of 381704220 in words is "three hundred eighty-one million, seven hundred four thousand, two hundred twenty".