1240405432 has 16 divisors (see below), whose sum is σ = 2658011760. Its totient is φ = 531602304.

The previous prime is 1240405423. The next prime is 1240405469. The reversal of 1240405432 is 2345040421.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1240405397 and 1240405406.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11074993 + ... + 11075104.

It is an arithmetic number, because the mean of its divisors is an integer number (166125735).

Almost surely, 2^1240405432 is an apocalyptic number.

It is an amenable number.

1240405432 is an abundant number, since it is smaller than the sum of its proper divisors (1417606328).

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

1240405432 is a wasteful number, since it uses less digits than its factorization.

1240405432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22150110 (or 22150106 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 1240405432 is about 35219.3900003961. The cubic root of 1240405432 is about 1074.4541471084.

Adding to 1240405432 its reverse (2345040421), we get a palindrome (3585445853).

The spelling of 1240405432 in words is "one billion, two hundred forty million, four hundred five thousand, four hundred thirty-two".