1449204381 has 12 divisors (see below), whose sum is σ = 2093694460. Its totient is φ = 965952000.

The previous prime is 1449204343. The next prime is 1449204397. The reversal of 1449204381 is 1834029441.

It is a happy number.

1449204381 is a `hidden beast` number, since 1 + 449 + 204 + 3 + 8 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 670292100 + 778912281 = 25890^2 + 27909^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1449204381 is a prime.

It is a super-2 number, since 2×1449204381² = 4200386675819186322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1449204181) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48381 + ... + 72381.

Almost surely, 2^1449204381 is an apocalyptic number.

It is an amenable number.

1449204381 is a deficient number, since it is larger than the sum of its proper divisors (644490079).

1449204381 is a wasteful number, since it uses less digits than its factorization.

1449204381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30716 (or 30713 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 1449204381 is about 38068.4171065727. The cubic root of 1449204381 is about 1131.6441414633.

The spelling of 1449204381 in words is "one billion, four hundred forty-nine million, two hundred four thousand, three hundred eighty-one".