278061145 has 8 divisors (see below), whose sum is σ = 348181056. Its totient is φ = 212777136.

The previous prime is 278061137. The next prime is 278061151. The reversal of 278061145 is 541160872.

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 278061145 - 2³ = 278061137 is a prime.

It is a super-2 number, since 2×278061145² = 154636000717422050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 278061145.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1208847 + ... + 1209076.

It is an arithmetic number, because the mean of its divisors is an integer number (43522632).

Almost surely, 2^278061145 is an apocalyptic number.

It is an amenable number.

278061145 is a deficient number, since it is larger than the sum of its proper divisors (70119911).

278061145 is a wasteful number, since it uses less digits than its factorization.

278061145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2417951.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 278061145 is about 16675.1655164199. The cubic root of 278061145 is about 652.6997338268.

The spelling of 278061145 in words is "two hundred seventy-eight million, sixty-one thousand, one hundred forty-five".