2278997385 has 16 divisors (see below), whose sum is σ = 4167309696. Its totient is φ = 1041827328.

The previous prime is 2278997381. The next prime is 2278997417. The reversal of 2278997385 is 5837998722.

It is not a de Polignac number, because 2278997385 - 2² = 2278997381 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2278997381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10852264 + ... + 10852473.

It is an arithmetic number, because the mean of its divisors is an integer number (260456856).

Almost surely, 2^2278997385 is an apocalyptic number.

It is an amenable number.

2278997385 is a deficient number, since it is larger than the sum of its proper divisors (1888312311).

2278997385 is a wasteful number, since it uses less digits than its factorization.

2278997385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21704752.

The product of its digits is 15240960, while the sum is 60.

The square root of 2278997385 is about 47738.8456605310. The cubic root of 2278997385 is about 1315.9759192278.

The spelling of 2278997385 in words is "two billion, two hundred seventy-eight million, nine hundred ninety-seven thousand, three hundred eighty-five".