312400240 has 20 divisors (see below), whose sum is σ = 726330744. Its totient is φ = 124960064.

The previous prime is 312400219. The next prime is 312400241. The reversal of 312400240 is 42004213.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312400241) 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, 1952422 + ... + 1952581.

Almost surely, 2^312400240 is an apocalyptic number.

It is an amenable number.

312400240 is an abundant number, since it is smaller than the sum of its proper divisors (413930504).

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

312400240 is a wasteful number, since it uses less digits than its factorization.

312400240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3905016 (or 3905010 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 312400240 is about 17674.8476655387. The cubic root of 312400240 is about 678.5321857163.

Adding to 312400240 its reverse (42004213), we get a palindrome (354404453).

The spelling of 312400240 in words is "three hundred twelve million, four hundred thousand, two hundred forty".