381607449 has 20 divisors (see below), whose sum is σ = 540965136. Its totient is φ = 239282752.

The previous prime is 381607423. The next prime is 381607469. The reversal of 381607449 is 944706183.

It is not a de Polignac number, because 381607449 - 2⁵ = 381607417 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 381607449.

It is not an unprimeable number, because it can be changed into a prime (381607469) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 249802 + ... + 251324.

Almost surely, 2^381607449 is an apocalyptic number.

It is an amenable number.

381607449 is a deficient number, since it is larger than the sum of its proper divisors (159357687).

381607449 is an frugal number, since it uses more digits than its factorization.

381607449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1594 (or 1543 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 381607449 is about 19534.7753762361. The cubic root of 381607449 is about 725.3355238107.

The spelling of 381607449 in words is "three hundred eighty-one million, six hundred seven thousand, four hundred forty-nine".