1224007920 has 120 divisors (see below), whose sum is σ = 4116944832. Its totient is φ = 325900800.

The previous prime is 1224007919. The next prime is 1224007931. The reversal of 1224007920 is 297004221.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 885630 + ... + 887010.

Almost surely, 2^1224007920 is an apocalyptic number.

1224007920 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 1224007920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2058472416).

1224007920 is an abundant number, since it is smaller than the sum of its proper divisors (2892936912).

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

1224007920 is a wasteful number, since it uses less digits than its factorization.

1224007920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2631 (or 2622 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 1224007920 is about 34985.8245579549. The cubic root of 1224007920 is about 1069.6985554309.

The spelling of 1224007920 in words is "one billion, two hundred twenty-four million, seven thousand, nine hundred twenty".