312012340 has 24 divisors (see below), whose sum is σ = 664457472. Its totient is φ = 123046560.

The previous prime is 312012329. The next prime is 312012341. The reversal of 312012340 is 43210213.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312012341) 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, 108444 + ... + 111283.

It is an arithmetic number, because the mean of its divisors is an integer number (27685728).

Almost surely, 2^312012340 is an apocalyptic number.

It is an amenable number.

312012340 is an abundant number, since it is smaller than the sum of its proper divisors (352445132).

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

312012340 is a wasteful number, since it uses less digits than its factorization.

312012340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219807 (or 219805 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 312012340 is about 17663.8710366669. The cubic root of 312012340 is about 678.2512302690.

Adding to 312012340 its reverse (43210213), we get a palindrome (355222553).

The spelling of 312012340 in words is "three hundred twelve million, twelve thousand, three hundred forty".