1224660340 has 24 divisors (see below), whose sum is σ = 2574756072. Its totient is φ = 489298560.

The previous prime is 1224660329. The next prime is 1224660377. The reversal of 1224660340 is 430664221.

It can be written as a sum of positive squares in 4 ways, for example, as 91126116 + 1133534224 = 9546^2 + 33668^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1224660299 and 1224660308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17371 + ... + 52450.

It is an arithmetic number, because the mean of its divisors is an integer number (107281503).

Almost surely, 2^1224660340 is an apocalyptic number.

1224660340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1224660340 is an abundant number, since it is smaller than the sum of its proper divisors (1350095732).

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

1224660340 is a wasteful number, since it uses less digits than its factorization.

1224660340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70707 (or 70705 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 1224660340 is about 34995.1473778866. The cubic root of 1224660340 is about 1069.8885783766. Note that the first 3 decimals are identical.

The spelling of 1224660340 in words is "one billion, two hundred twenty-four million, six hundred sixty thousand, three hundred forty".