312240424 has 16 divisors (see below), whose sum is σ = 585695700. Its totient is φ = 156054912.

The previous prime is 312240347. The next prime is 312240427. The reversal of 312240424 is 424042213.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 305900100 + 6340324 = 17490^2 + 2518^2 .

It is a junction number, because it is equal to n+sod(n) for n = 312240395 and 312240404.

It is not an unprimeable number, because it can be changed into a prime (312240427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16564 + ... + 29980.

Almost surely, 2^312240424 is an apocalyptic number.

It is an amenable number.

312240424 is a deficient number, since it is larger than the sum of its proper divisors (273455276).

312240424 is a wasteful number, since it uses less digits than its factorization.

312240424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16332 (or 16328 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 312240424 is about 17670.3260864083. The cubic root of 312240424 is about 678.4164593895.

Adding to 312240424 its reverse (424042213), we get a palindrome (736282637).

The spelling of 312240424 in words is "three hundred twelve million, two hundred forty thousand, four hundred twenty-four".