1223024240 has 40 divisors (see below), whose sum is σ = 2859275328. Its totient is φ = 486501120.

The previous prime is 1223024239. The next prime is 1223024267. The reversal of 1223024240 is 424203221.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 27752 + ... + 56711.

Almost surely, 2^1223024240 is an apocalyptic number.

1223024240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223024240 is an abundant number, since it is smaller than the sum of its proper divisors (1636251088).

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

1223024240 is a wasteful number, since it uses less digits than its factorization.

1223024240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84657 (or 84651 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 1223024240 is about 34971.7634671173. The cubic root of 1223024240 is about 1069.4119224597.

Adding to 1223024240 its reverse (424203221), we get a palindrome (1647227461).

The spelling of 1223024240 in words is "one billion, two hundred twenty-three million, twenty-four thousand, two hundred forty".