308612 has 6 divisors (see below), whose sum is σ = 540078. Its totient is φ = 154304.

The previous prime is 308597. The next prime is 308621. The reversal of 308612 is 216803.

It can be written as a sum of positive squares in only one way, i.e., 287296 + 21316 = 536^2 + 146^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38573 + ... + 38580.

It is an arithmetic number, because the mean of its divisors is an integer number (90013).

2³⁰⁸⁶¹² is an apocalyptic number.

It is an amenable number.

308612 is a deficient number, since it is larger than the sum of its proper divisors (231466).

308612 is a wasteful number, since it uses less digits than its factorization.

308612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77157 (or 77155 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 308612 is about 555.5285771227. The cubic root of 308612 is about 67.5778343116.

Subtracting from 308612 its reverse (216803), we obtain a square (91809 = 303²).

The spelling of 308612 in words is "three hundred eight thousand, six hundred twelve".