378198549 has 12 divisors (see below), whose sum is σ = 547462656. Its totient is φ = 251589672.

The previous prime is 378198523. The next prime is 378198551. The reversal of 378198549 is 945891873.

378198549 is a `hidden beast` number, since 3 + 7 + 8 + 1 + 98 + 549 = 666.

It is not a de Polignac number, because 378198549 - 2¹⁷ = 378067477 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 378198495 and 378198504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378198749) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40789 + ... + 49194.

It is an arithmetic number, because the mean of its divisors is an integer number (45621888).

Almost surely, 2^378198549 is an apocalyptic number.

It is an amenable number.

378198549 is a deficient number, since it is larger than the sum of its proper divisors (169264107).

378198549 is a wasteful number, since it uses less digits than its factorization.

378198549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90456 (or 90453 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 378198549 is about 19447.3275541911. The cubic root of 378198549 is about 723.1692526854.

The spelling of 378198549 in words is "three hundred seventy-eight million, one hundred ninety-eight thousand, five hundred forty-nine".