277220012 has 24 divisors (see below), whose sum is σ = 506891616. Its totient is φ = 132409728.

The previous prime is 277219993. The next prime is 277220017. The reversal of 277220012 is 210022772.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a self number, because there is not a number n which added to its sum of digits gives 277220012.

It is not an unprimeable number, because it can be changed into a prime (277220017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93578 + ... + 96494.

It is an arithmetic number, because the mean of its divisors is an integer number (21120484).

Almost surely, 2^277220012 is an apocalyptic number.

It is an amenable number.

277220012 is a deficient number, since it is larger than the sum of its proper divisors (229671604).

277220012 is a wasteful number, since it uses less digits than its factorization.

277220012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3977 (or 3975 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 277220012 is about 16649.9252851176. The cubic root of 277220012 is about 652.0409317272.

Adding to 277220012 its reverse (210022772), we get a palindrome (487242784).

The spelling of 277220012 in words is "two hundred seventy-seven million, two hundred twenty thousand, twelve".