2278013945 has 16 divisors (see below), whose sum is σ = 2829580560. Its totient is φ = 1758511104.

The previous prime is 2278013939. The next prime is 2278013963. The reversal of 2278013945 is 5493108722.

It can be written as a sum of positive squares in 8 ways, for example, as 337787641 + 1940226304 = 18379^2 + 44048^2 .

It is a cyclic number.

It is not a de Polignac number, because 2278013945 - 2¹⁰ = 2278012921 is a prime.

It is a super-2 number, since 2×2278013945² = 10378695067228926050, which contains 22 as substring.

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, 308537 + ... + 315833.

It is an arithmetic number, because the mean of its divisors is an integer number (176848785).

Almost surely, 2^2278013945 is an apocalyptic number.

It is an amenable number.

2278013945 is a deficient number, since it is larger than the sum of its proper divisors (551566615).

2278013945 is a wasteful number, since it uses less digits than its factorization.

2278013945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9484.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 2278013945 is about 47728.5443419344. The cubic root of 2278013945 is about 1315.7866006605.

The spelling of 2278013945 in words is "two billion, two hundred seventy-eight million, thirteen thousand, nine hundred forty-five".