1209296880 has 240 divisors, whose sum is σ = 4474963584. Its totient is φ = 290219520.

The previous prime is 1209296861. The next prime is 1209296899. The reversal of 1209296880 is 886929021.

It is an interprime number because it is at equal distance from previous prime (1209296861) and next prime (1209296899).

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 846727 + ... + 848153.

Almost surely, 2^1209296880 is an apocalyptic number.

1209296880 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 1209296880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2237481792).

1209296880 is an abundant number, since it is smaller than the sum of its proper divisors (3265666704).

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

1209296880 is a wasteful number, since it uses less digits than its factorization.

1209296880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564 (or 1555 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 1209296880 is about 34774.9461538045. The cubic root of 1209296880 is about 1065.3957928497.

The spelling of 1209296880 in words is "one billion, two hundred nine million, two hundred ninety-six thousand, eight hundred eighty".