378906287 has 4 divisors (see below), whose sum is σ = 380030976. Its totient is φ = 377781600.

The previous prime is 378906271. The next prime is 378906293. The reversal of 378906287 is 782609873.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 378906287 - 2⁴ = 378906271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378906887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 561839 + ... + 562512.

It is an arithmetic number, because the mean of its divisors is an integer number (95007744).

Almost surely, 2^378906287 is an apocalyptic number.

378906287 is a deficient number, since it is larger than the sum of its proper divisors (1124689).

378906287 is a wasteful number, since it uses less digits than its factorization.

378906287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1124688.

The product of its (nonzero) digits is 1016064, while the sum is 50.

The square root of 378906287 is about 19465.5153283955. The cubic root of 378906287 is about 723.6200700615.

The spelling of 378906287 in words is "three hundred seventy-eight million, nine hundred six thousand, two hundred eighty-seven".