1244023920 has 280 divisors, whose sum is σ = 4405874256. Its totient is φ = 326467584.

The previous prime is 1244023901. The next prime is 1244023939. The reversal of 1244023920 is 293204421.

It is an interprime number because it is at equal distance from previous prime (1244023901) and next prime (1244023939).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 4840432 + ... + 4840688.

Almost surely, 2^1244023920 is an apocalyptic number.

1244023920 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 1244023920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2202937128).

1244023920 is an abundant number, since it is smaller than the sum of its proper divisors (3161850336).

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

1244023920 is an equidigital number, since it uses as much as digits as its factorization.

1244023920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371 (or 350 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 1244023920 is about 35270.7232701571. The cubic root of 1244023920 is about 1075.4979254525.

The spelling of 1244023920 in words is "one billion, two hundred forty-four million, twenty-three thousand, nine hundred twenty".