378638485 has 16 divisors (see below), whose sum is σ = 470700720. Its totient is φ = 292188160.

The previous prime is 378638461. The next prime is 378638503. The reversal of 378638485 is 584836873.

It can be written as a sum of positive squares in 8 ways, for example, as 127035441 + 251603044 = 11271^2 + 15862^2 .

It is not a de Polignac number, because 378638485 - 2¹¹ = 378636437 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7869 + ... + 28621.

It is an arithmetic number, because the mean of its divisors is an integer number (29418795).

Almost surely, 2^378638485 is an apocalyptic number.

It is an amenable number.

378638485 is a deficient number, since it is larger than the sum of its proper divisors (92062235).

378638485 is a wasteful number, since it uses less digits than its factorization.

378638485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20888.

The product of its digits is 3870720, while the sum is 52.

The square root of 378638485 is about 19458.6352296352. The cubic root of 378638485 is about 723.4495506998.

The spelling of 378638485 in words is "three hundred seventy-eight million, six hundred thirty-eight thousand, four hundred eighty-five".