378678491 has 8 divisors (see below), whose sum is σ = 391986000. Its totient is φ = 365387680.

The previous prime is 378678479. The next prime is 378678497. The reversal of 378678491 is 194876873.

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

It is a cyclic number.

It is not a de Polignac number, because 378678491 - 2⁶ = 378678427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (378678497) 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, 57761 + ... + 63981.

It is an arithmetic number, because the mean of its divisors is an integer number (48998250).

Almost surely, 2^378678491 is an apocalyptic number.

378678491 is a deficient number, since it is larger than the sum of its proper divisors (13307509).

378678491 is a wasteful number, since it uses less digits than its factorization.

378678491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8349.

The product of its digits is 2032128, while the sum is 53.

The square root of 378678491 is about 19459.6631779689. The cubic root of 378678491 is about 723.4750290955.

The spelling of 378678491 in words is "three hundred seventy-eight million, six hundred seventy-eight thousand, four hundred ninety-one".