2278263981 has 32 divisors (see below), whose sum is σ = 3501059328. Its totient is φ = 1290885120.

The previous prime is 2278263961. The next prime is 2278264003. The reversal of 2278263981 is 1893628722.

It is not a de Polignac number, because 2278263981 - 2¹⁰ = 2278262957 is a prime.

It is a super-2 number, since 2×2278263981² = 10380973534243936722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 2278263981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2278263941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1374105 + ... + 1375761.

It is an arithmetic number, because the mean of its divisors is an integer number (109408104).

Almost surely, 2^2278263981 is an apocalyptic number.

2278263981 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2278263981 is a deficient number, since it is larger than the sum of its proper divisors (1222795347).

2278263981 is a wasteful number, since it uses less digits than its factorization.

2278263981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2181.

The product of its digits is 580608, while the sum is 48.

The square root of 2278263981 is about 47731.1636250364. The cubic root of 2278263981 is about 1315.8347393741.

The spelling of 2278263981 in words is "two billion, two hundred seventy-eight million, two hundred sixty-three thousand, nine hundred eighty-one".