1224246520 has 64 divisors (see below), whose sum is σ = 3176003520. Its totient is φ = 416016384.

The previous prime is 1224246509. The next prime is 1224246547. The reversal of 1224246520 is 256424221.

It is a super-2 number, since 2×1224246520² = 2997559083464220800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12294 + ... + 50986.

It is an arithmetic number, because the mean of its divisors is an integer number (49625055).

Almost surely, 2^1224246520 is an apocalyptic number.

1224246520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1224246520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1588001760).

1224246520 is an abundant number, since it is smaller than the sum of its proper divisors (1951757000).

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

1224246520 is a wasteful number, since it uses less digits than its factorization.

1224246520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38824 (or 38820 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 1224246520 is about 34989.2343442951. The cubic root of 1224246520 is about 1069.7680575664.

The spelling of 1224246520 in words is "one billion, two hundred twenty-four million, two hundred forty-six thousand, five hundred twenty".