378987 has 8 divisors (see below), whose sum is σ = 577536. Its totient is φ = 216552.

The previous prime is 378977. The next prime is 378997. The reversal of 378987 is 789873.

It is an interprime number because it is at equal distance from previous prime (378977) and next prime (378997).

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

It is not a de Polignac number, because 378987 - 2¹⁰ = 377963 is a prime.

It is a super-2 number, since 2×378987² = 287262292338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (378967) 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, 9003 + ... + 9044.

It is an arithmetic number, because the mean of its divisors is an integer number (72192).

2³⁷⁸⁹⁸⁷ is an apocalyptic number.

378987 is a deficient number, since it is larger than the sum of its proper divisors (198549).

378987 is a wasteful number, since it uses less digits than its factorization.

378987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18057.

The product of its digits is 84672, while the sum is 42.

The square root of 378987 is about 615.6192004803. The cubic root of 378987 is about 72.3671447233.

The spelling of 378987 in words is "three hundred seventy-eight thousand, nine hundred eighty-seven".