1215423360 has 256 divisors, whose sum is σ = 4423291200. Its totient is φ = 315187200.

The previous prime is 1215423329. The next prime is 1215423361. The reversal of 1215423360 is 633245121.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215423361) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 638410 + ... + 640310.

Almost surely, 2^1215423360 is an apocalyptic number.

1215423360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1215423360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2211645600).

1215423360 is an abundant number, since it is smaller than the sum of its proper divisors (3207867840).

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

1215423360 is a wasteful number, since it uses less digits than its factorization.

1215423360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1966 (or 1948 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 1215423360 is about 34862.9224248341. The cubic root of 1215423360 is about 1067.1919149258.

Adding to 1215423360 its reverse (633245121), we get a palindrome (1848668481).

It can be divided in two parts, 1215 and 423360, that multiplied together give a square (514382400 = 22680²).

The spelling of 1215423360 in words is "one billion, two hundred fifteen million, four hundred twenty-three thousand, three hundred sixty".