40312420 has 12 divisors (see below), whose sum is σ = 84656124. Its totient is φ = 16124960.

The previous prime is 40312403. The next prime is 40312421. The reversal of 40312420 is 2421304.

40312420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 24820324 + 15492096 = 4982^2 + 3936^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40312394 and 40312403.

It is not an unprimeable number, because it can be changed into a prime (40312421) by changing a digit.

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, 1007791 + ... + 1007830.

It is an arithmetic number, because the mean of its divisors is an integer number (7054677).

Almost surely, 2^40312420 is an apocalyptic number.

It is an amenable number.

40312420 is an abundant number, since it is smaller than the sum of its proper divisors (44343704).

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

40312420 is a wasteful number, since it uses less digits than its factorization.

40312420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2015630 (or 2015628 counting only the distinct ones).

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

The square root of 40312420 is about 6349.2062496032. The cubic root of 40312420 is about 342.8832657014.

Adding to 40312420 its reverse (2421304), we get a palindrome (42733724).

The spelling of 40312420 in words is "forty million, three hundred twelve thousand, four hundred twenty".