1087721472 has 208 divisors, whose sum is σ = 3170506752. Its totient is φ = 330301440.

The previous prime is 1087721471. The next prime is 1087721527. The reversal of 1087721472 is 2741277801.

It is a self number, because there is not a number n which added to its sum of digits gives 1087721472.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1087721471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8564673 + ... + 8564799.

Almost surely, 2^1087721472 is an apocalyptic number.

1087721472 is a gapful number since it is divisible by the number (12) 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 1087721472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1585253376).

1087721472 is an abundant number, since it is smaller than the sum of its proper divisors (2082785280).

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

1087721472 is a wasteful number, since it uses less digits than its factorization.

1087721472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 39.

The square root of 1087721472 is about 32980.6226745342. The cubic root of 1087721472 is about 1028.4248623612.

The spelling of 1087721472 in words is "one billion, eighty-seven million, seven hundred twenty-one thousand, four hundred seventy-two".