1223203640 has 16 divisors (see below), whose sum is σ = 2752208280. Its totient is φ = 489281440.

The previous prime is 1223203621. The next prime is 1223203693. The reversal of 1223203640 is 463023221.

It is a congruent number.

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, 15290006 + ... + 15290085.

Almost surely, 2^1223203640 is an apocalyptic number.

1223203640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223203640 is an abundant number, since it is smaller than the sum of its proper divisors (1529004640).

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

1223203640 is a wasteful number, since it uses less digits than its factorization.

1223203640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30580102 (or 30580098 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1223203640 is about 34974.3282994828. The cubic root of 1223203640 is about 1069.4642090001.

Adding to 1223203640 its reverse (463023221), we get a palindrome (1686226861).

The spelling of 1223203640 in words is "one billion, two hundred twenty-three million, two hundred three thousand, six hundred forty".