1215423340 has 12 divisors (see below), whose sum is σ = 2552389056. Its totient is φ = 486169328.

The previous prime is 1215423329. The next prime is 1215423361. The reversal of 1215423340 is 433245121.

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, 30385564 + ... + 30385603.

It is an arithmetic number, because the mean of its divisors is an integer number (212699088).

Almost surely, 2^1215423340 is an apocalyptic number.

1215423340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1215423340 is an abundant number, since it is smaller than the sum of its proper divisors (1336965716).

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

1215423340 is a wasteful number, since it uses less digits than its factorization.

1215423340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60771176 (or 60771174 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 1215423340 is about 34862.9221379964. The cubic root of 1215423340 is about 1067.1919090722.

Adding to 1215423340 its reverse (433245121), we get a palindrome (1648668461).

The spelling of 1215423340 in words is "one billion, two hundred fifteen million, four hundred twenty-three thousand, three hundred forty".