1215004672 has 64 divisors (see below), whose sum is σ = 2777635440. Its totient is φ = 520617984.

The previous prime is 1215004667. The next prime is 1215004729. The reversal of 1215004672 is 2764005121.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 1215004672.

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, 226728 + ... + 232024.

Almost surely, 2^1215004672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1215004672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1388817720).

1215004672 is an abundant number, since it is smaller than the sum of its proper divisors (1562630768).

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

1215004672 is an frugal number, since it uses more digits than its factorization.

1215004672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5334 (or 5306 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 1215004672 is about 34856.9171327586. The cubic root of 1215004672 is about 1067.0693590659.

Adding to 1215004672 its reverse (2764005121), we get a palindrome (3979009793).

The spelling of 1215004672 in words is "one billion, two hundred fifteen million, four thousand, six hundred seventy-two".