378638877 has 8 divisors (see below), whose sum is σ = 522260640. Its totient is φ = 243721520.

The previous prime is 378638873. The next prime is 378638891. The reversal of 378638877 is 778836873.

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 378638877 - 2² = 378638873 is a prime.

It is a super-2 number, since 2×378638877² = 286734798351642258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378638873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2175999 + ... + 2176172.

It is an arithmetic number, because the mean of its divisors is an integer number (65282580).

Almost surely, 2^378638877 is an apocalyptic number.

It is an amenable number.

378638877 is a deficient number, since it is larger than the sum of its proper divisors (143621763).

378638877 is a wasteful number, since it uses less digits than its factorization.

378638877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4352203.

The product of its digits is 9483264, while the sum is 57.

The square root of 378638877 is about 19458.6453022815. The cubic root of 378638877 is about 723.4498003594.

The spelling of 378638877 in words is "three hundred seventy-eight million, six hundred thirty-eight thousand, eight hundred seventy-seven".