1209551338 has 8 divisors (see below), whose sum is σ = 1815184800. Its totient is φ = 604489740.

The previous prime is 1209551327. The next prime is 1209551353. The reversal of 1209551338 is 8331559021.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1209551297 and 1209551306.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137638 + ... + 146161.

It is an arithmetic number, because the mean of its divisors is an integer number (226898100).

Almost surely, 2^1209551338 is an apocalyptic number.

1209551338 is a deficient number, since it is larger than the sum of its proper divisors (605633462).

1209551338 is a wasteful number, since it uses less digits than its factorization.

1209551338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285932.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 1209551338 is about 34778.6046011050. The cubic root of 1209551338 is about 1065.4705138094.

The spelling of 1209551338 in words is "one billion, two hundred nine million, five hundred fifty-one thousand, three hundred thirty-eight".