1224653472 has 144 divisors (see below), whose sum is σ = 4155217920. Its totient is φ = 349888896.

The previous prime is 1224653461. The next prime is 1224653473. The reversal of 1224653472 is 2743564221.

1224653472 is a `hidden beast` number, since 12 + 2 + 46 + 534 + 72 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×1224653472² = 2999552252963309568, 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 (1224653473) 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, 27873 + ... + 56799.

It is an arithmetic number, because the mean of its divisors is an integer number (28855680).

Almost surely, 2^1224653472 is an apocalyptic number.

1224653472 is a gapful number since it is divisible by the number (12) 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 1224653472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2077608960).

1224653472 is an abundant number, since it is smaller than the sum of its proper divisors (2930564448).

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

1224653472 is a wasteful number, since it uses less digits than its factorization.

1224653472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28960 (or 28939 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

The square root of 1224653472 is about 34995.0492498582. The cubic root of 1224653472 is about 1069.8865783639.

The spelling of 1224653472 in words is "one billion, two hundred twenty-four million, six hundred fifty-three thousand, four hundred seventy-two".