1209479340 has 48 divisors (see below), whose sum is σ = 3393105408. Its totient is φ = 321902784.

The previous prime is 1209479317. The next prime is 1209479351. The reversal of 1209479340 is 439749021.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12109 + ... + 50651.

It is an arithmetic number, because the mean of its divisors is an integer number (70689696).

Almost surely, 2^1209479340 is an apocalyptic number.

1209479340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1209479340 is an abundant number, since it is smaller than the sum of its proper divisors (2183626068).

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

1209479340 is a wasteful number, since it uses less digits than its factorization.

1209479340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39078 (or 39076 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 1209479340 is about 34777.5694952939. The cubic root of 1209479340 is about 1065.4493728387.

The spelling of 1209479340 in words is "one billion, two hundred nine million, four hundred seventy-nine thousand, three hundred forty".