1209916448 has 48 divisors (see below), whose sum is σ = 2572007256. Its totient is φ = 556953600.

The previous prime is 1209916439. The next prime is 1209916457. The reversal of 1209916448 is 8446199021.

It is an interprime number because it is at equal distance from previous prime (1209916439) and next prime (1209916457).

It can be written as a sum of positive squares in 4 ways, for example, as 1190802064 + 19114384 = 34508^2 + 4372^2 .

It is a super-2 number, since 2×1209916448² = 2927795622281873408, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1209916399 and 1209916408.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163190 + ... + 170442.

Almost surely, 2^1209916448 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 1209916448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1286003628).

1209916448 is an abundant number, since it is smaller than the sum of its proper divisors (1362090808).

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

1209916448 is a wasteful number, since it uses less digits than its factorization.

1209916448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7677 (or 7669 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 1209916448 is about 34783.8532655599. The cubic root of 1209916448 is about 1065.5777091502.

The spelling of 1209916448 in words is "one billion, two hundred nine million, nine hundred sixteen thousand, four hundred forty-eight".