378148986 has 120 divisors (see below), whose sum is σ = 926743356. Its totient is φ = 115153920.

The previous prime is 378148937. The next prime is 378148993. The reversal of 378148986 is 689841873.

378148986 is a `hidden beast` number, since 3 + 7 + 81 + 489 + 86 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 306425025 + 71723961 = 17505^2 + 8469^2 .

It is a super-2 number, since 2×378148986² = 285993311225656392, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

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 59 ways as a sum of consecutive naturals, for example, 1919440 + ... + 1919636.

Almost surely, 2^378148986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 378148986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (463371678).

378148986 is an abundant number, since it is smaller than the sum of its proper divisors (548594370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

378148986 is a wasteful number, since it uses less digits than its factorization.

378148986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286 (or 260 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 378148986 is about 19446.0532242406. The cubic root of 378148986 is about 723.1376608107.

The spelling of 378148986 in words is "three hundred seventy-eight million, one hundred forty-eight thousand, nine hundred eighty-six".