307768212 has 18 divisors (see below), whose sum is σ = 777969738. Its totient is φ = 102589392.

The previous prime is 307768193. The next prime is 307768229. The reversal of 307768212 is 212867703.

It can be written as a sum of positive squares in only one way, i.e., 154107396 + 153660816 = 12414^2 + 12396^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 8549117 = 307768212 / (3 + 0 + 7 + 7 + 6 + 8 + 2 + 1 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4274523 + ... + 4274594.

It is an arithmetic number, because the mean of its divisors is an integer number (43220541).

Almost surely, 2^307768212 is an apocalyptic number.

It is an amenable number.

307768212 is an abundant number, since it is smaller than the sum of its proper divisors (470201526).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

307768212 is a wasteful number, since it uses less digits than its factorization.

307768212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8549127 (or 8549122 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 307768212 is about 17543.3238583799. The cubic root of 307768212 is about 675.1618903876.

It can be divided in two parts, 3077 and 68212, that added together give a square (71289 = 267²).

The spelling of 307768212 in words is "three hundred seven million, seven hundred sixty-eight thousand, two hundred twelve".