1224155268 has 72 divisors (see below), whose sum is σ = 3667448512. Its totient is φ = 349756704.

The previous prime is 1224155263. The next prime is 1224155281. The reversal of 1224155268 is 8625514221.

1224155268 is a `hidden beast` number, since 1 + 2 + 2 + 41 + 552 + 68 = 666.

It is a super-2 number, since 2×1224155268² = 2997112240344303648, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1224155263) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83155 + ... + 96762.

Almost surely, 2^1224155268 is an apocalyptic number.

1224155268 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1224155268 is an abundant number, since it is smaller than the sum of its proper divisors (2443293244).

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

1224155268 is a wasteful number, since it uses less digits than its factorization.

1224155268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179943 (or 179929 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 1224155268 is about 34987.9303188971. The cubic root of 1224155268 is about 1069.7414777072.

Adding to 1224155268 its reverse (8625514221), we get a palindrome (9849669489).

The spelling of 1224155268 in words is "one billion, two hundred twenty-four million, one hundred fifty-five thousand, two hundred sixty-eight".