1209120384 has 32 divisors (see below), whose sum is σ = 3211727040. Its totient is φ = 403040000.

The previous prime is 1209120383. The next prime is 1209120431. The reversal of 1209120384 is 4830219021.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (1209120383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1573992 + ... + 1574759.

It is an arithmetic number, because the mean of its divisors is an integer number (100366470).

Almost surely, 2^1209120384 is an apocalyptic number.

It is an amenable number.

1209120384 is an abundant number, since it is smaller than the sum of its proper divisors (2002606656).

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

1209120384 is an equidigital number, since it uses as much as digits as its factorization.

1209120384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3148768 (or 3148756 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1209120384 is about 34772.4083721562. The cubic root of 1209120384 is about 1065.3439590809.

The spelling of 1209120384 in words is "one billion, two hundred nine million, one hundred twenty thousand, three hundred eighty-four".