1234218540 has 48 divisors (see below), whose sum is σ = 3574982880. Its totient is φ = 317775360.

The previous prime is 1234218481. The next prime is 1234218541. The reversal of 1234218540 is 458124321.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1234218498 and 1234218507.

It is not an unprimeable number, because it can be changed into a prime (1234218541) 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 15 ways as a sum of consecutive naturals, for example, 352921 + ... + 356400.

It is an arithmetic number, because the mean of its divisors is an integer number (74478810).

Almost surely, 2^1234218540 is an apocalyptic number.

1234218540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1234218540 is an abundant number, since it is smaller than the sum of its proper divisors (2340764340).

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

1234218540 is a wasteful number, since it uses less digits than its factorization.

1234218540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709362 (or 709360 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 1234218540 is about 35131.4465970304. The cubic root of 1234218540 is about 1072.6647819795.

The spelling of 1234218540 in words is "one billion, two hundred thirty-four million, two hundred eighteen thousand, five hundred forty".