1378432287 has 12 divisors (see below), whose sum is σ = 1996039344. Its totient is φ = 916660800.

The previous prime is 1378432283. The next prime is 1378432331. The reversal of 1378432287 is 7822348731.

1378432287 is a `hidden beast` number, since 137 + 8 + 432 + 2 + 87 = 666.

It is not a de Polignac number, because 1378432287 - 2² = 1378432283 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378432283) 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, 187363 + ... + 194580.

It is an arithmetic number, because the mean of its divisors is an integer number (166336612).

Almost surely, 2^1378432287 is an apocalyptic number.

1378432287 is a deficient number, since it is larger than the sum of its proper divisors (617607057).

1378432287 is a wasteful number, since it uses less digits than its factorization.

1378432287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382350 (or 382347 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 1378432287 is about 37127.2445382094. The cubic root of 1378432287 is about 1112.9145295608.

The spelling of 1378432287 in words is "one billion, three hundred seventy-eight million, four hundred thirty-two thousand, two hundred eighty-seven".