1240432420 has 48 divisors (see below), whose sum is σ = 2626581888. Its totient is φ = 492065280.

The previous prime is 1240432397. The next prime is 1240432429. The reversal of 1240432420 is 242340421.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1240432391 and 1240432400.

It is not an unprimeable number, because it can be changed into a prime (1240432429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1965505 + ... + 1966135.

It is an arithmetic number, because the mean of its divisors is an integer number (54720456).

Almost surely, 2^1240432420 is an apocalyptic number.

1240432420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1240432420 is an abundant number, since it is smaller than the sum of its proper divisors (1386149468).

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

1240432420 is a wasteful number, since it uses less digits than its factorization.

1240432420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300 (or 1298 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 1240432420 is about 35219.7731395306. The cubic root of 1240432420 is about 1074.4619394956.

Adding to 1240432420 its reverse (242340421), we get a palindrome (1482772841).

The spelling of 1240432420 in words is "one billion, two hundred forty million, four hundred thirty-two thousand, four hundred twenty".