312420440 has 16 divisors (see below), whose sum is σ = 702946080. Its totient is φ = 124968160.

The previous prime is 312420391. The next prime is 312420457. The reversal of 312420440 is 44024213.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3905216 + ... + 3905295.

It is an arithmetic number, because the mean of its divisors is an integer number (43934130).

Almost surely, 2^312420440 is an apocalyptic number.

It is an amenable number.

312420440 is an abundant number, since it is smaller than the sum of its proper divisors (390525640).

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

312420440 is a wasteful number, since it uses less digits than its factorization.

312420440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7810522 (or 7810518 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 312420440 is about 17675.4190897981. The cubic root of 312420440 is about 678.5468101766.

Adding to 312420440 its reverse (44024213), we get a palindrome (356444653).

The spelling of 312420440 in words is "three hundred twelve million, four hundred twenty thousand, four hundred forty".