380644581 has 8 divisors (see below), whose sum is σ = 508199584. Its totient is φ = 253426320.

The previous prime is 380644571. The next prime is 380644631. The reversal of 380644581 is 185446083.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 380644581 - 2¹¹ = 380642533 is a prime.

It is a super-2 number, since 2×380644581² = 289780594089331122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (380644531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81535 + ... + 86076.

It is an arithmetic number, because the mean of its divisors is an integer number (63524948).

Almost surely, 2^380644581 is an apocalyptic number.

It is an amenable number.

380644581 is a deficient number, since it is larger than the sum of its proper divisors (127555003).

380644581 is a wasteful number, since it uses less digits than its factorization.

380644581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168371.

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 380644581 is about 19510.1148382064. The cubic root of 380644581 is about 724.7249569464.

The spelling of 380644581 in words is "three hundred eighty million, six hundred forty-four thousand, five hundred eighty-one".