1224001836 has 36 divisors (see below), whose sum is σ = 3276006552. Its totient is φ = 384000384.

The previous prime is 1224001829. The next prime is 1224001841. The reversal of 1224001836 is 6381004221.

It is a tau number, because it is divible by the number of its divisors (36).

1224001836 is a modest number, since divided by 1836 gives 1224 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 999390 + ... + 1000613.

It is an arithmetic number, because the mean of its divisors is an integer number (91000182).

Almost surely, 2^1224001836 is an apocalyptic number.

It is an amenable number.

1224001836 is an abundant number, since it is smaller than the sum of its proper divisors (2052004716).

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

1224001836 is a wasteful number, since it uses less digits than its factorization.

1224001836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2000030 (or 2000025 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 1224001836 is about 34985.7376083455. The cubic root of 1224001836 is about 1069.6967830957.

The spelling of 1224001836 in words is "one billion, two hundred twenty-four million, one thousand, eight hundred thirty-six".