1209743424 has 252 divisors, whose sum is σ = 3739422544. Its totient is φ = 387991296.

The previous prime is 1209743413. The next prime is 1209743449. The reversal of 1209743424 is 4243479021.

It is a super-2 number, since 2×1209743424² = 2926958303822487552, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 18055839 + ... + 18055905.

Almost surely, 2^1209743424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1209743424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1869711272).

1209743424 is an abundant number, since it is smaller than the sum of its proper divisors (2529679120).

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

1209743424 is an frugal number, since it uses more digits than its factorization.

1209743424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 1209743424 is about 34781.3660456285. The cubic root of 1209743424 is about 1065.5269124452.

The spelling of 1209743424 in words is "one billion, two hundred nine million, seven hundred forty-three thousand, four hundred twenty-four".