278198002 has 4 divisors (see below), whose sum is σ = 417297006. Its totient is φ = 139099000.

The previous prime is 278197991. The next prime is 278198023. The reversal of 278198002 is 200891872.

278198002 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 230159241 + 48038761 = 15171^2 + 6931^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69549499 + ... + 69549502.

Almost surely, 2^278198002 is an apocalyptic number.

278198002 is a deficient number, since it is larger than the sum of its proper divisors (139099004).

278198002 is a wasteful number, since it uses less digits than its factorization.

278198002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139099003.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 278198002 is about 16679.2686290497. The cubic root of 278198002 is about 652.8067988592.

The spelling of 278198002 in words is "two hundred seventy-eight million, one hundred ninety-eight thousand, two".