380721844 has 6 divisors (see below), whose sum is σ = 666263234. Its totient is φ = 190360920.

The previous prime is 380721841. The next prime is 380721863. The reversal of 380721844 is 448127083.

380721844 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 377524900 + 3196944 = 19430^2 + 1788^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (380721841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47590227 + ... + 47590234.

Almost surely, 2^380721844 is an apocalyptic number.

It is an amenable number.

380721844 is a deficient number, since it is larger than the sum of its proper divisors (285541390).

380721844 is a wasteful number, since it uses less digits than its factorization.

380721844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95180465 (or 95180463 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 380721844 is about 19512.0948132178. The cubic root of 380721844 is about 724.7739883693.

It can be divided in two parts, 3807 and 21844, that added together give a triangular number (25651 = T₂₂₆).

The spelling of 380721844 in words is "three hundred eighty million, seven hundred twenty-one thousand, eight hundred forty-four".