420440312 has 8 divisors (see below), whose sum is σ = 788325600. Its totient is φ = 210220152.

The previous prime is 420440269. The next prime is 420440327. The reversal of 420440312 is 213044024.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26277512 + ... + 26277527.

It is an arithmetic number, because the mean of its divisors is an integer number (98540700).

Almost surely, 2^420440312 is an apocalyptic number.

It is an amenable number.

420440312 is a deficient number, since it is larger than the sum of its proper divisors (367885288).

420440312 is a wasteful number, since it uses less digits than its factorization.

420440312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52555045 (or 52555041 counting only the distinct ones).

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

The square root of 420440312 is about 20504.6412307068. The cubic root of 420440312 is about 749.1488489398.

Adding to 420440312 its reverse (213044024), we get a palindrome (633484336).

The spelling of 420440312 in words is "four hundred twenty million, four hundred forty thousand, three hundred twelve".