1209620238 has 32 divisors (see below), whose sum is σ = 2454423552. Its totient is φ = 397380000.

The previous prime is 1209620233. The next prime is 1209620239. The reversal of 1209620238 is 8320269021.

It is a happy number.

It is a super-2 number, since 2×1209620238² = 2926362240358353288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1209620199 and 1209620208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1209620231) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 130663 + ... + 139613.

It is an arithmetic number, because the mean of its divisors is an integer number (76700736).

Almost surely, 2^1209620238 is an apocalyptic number.

1209620238 is an abundant number, since it is smaller than the sum of its proper divisors (1244803314).

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

1209620238 is a wasteful number, since it uses less digits than its factorization.

1209620238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9280.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 1209620238 is about 34779.5951385291. The cubic root of 1209620238 is about 1065.4907443203.

Adding to 1209620238 its reverse (8320269021), we get a palindrome (9529889259).

The spelling of 1209620238 in words is "one billion, two hundred nine million, six hundred twenty thousand, two hundred thirty-eight".