1087717680 has 480 divisors, whose sum is σ = 4478284800. Its totient is φ = 241823232.

The previous prime is 1087717669. The next prime is 1087717733. The reversal of 1087717680 is 867177801.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4551001 + ... + 4551239.

It is an arithmetic number, because the mean of its divisors is an integer number (9329760).

Almost surely, 2^1087717680 is an apocalyptic number.

1087717680 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 1087717680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2239142400).

1087717680 is an abundant number, since it is smaller than the sum of its proper divisors (3390567120).

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

1087717680 is a wasteful number, since it uses less digits than its factorization.

1087717680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318 (or 299 counting only the distinct ones).

The product of its (nonzero) digits is 131712, while the sum is 45.

The square root of 1087717680 is about 32980.5651861820. The cubic root of 1087717680 is about 1028.4236672662.

The spelling of 1087717680 in words is "one billion, eighty-seven million, seven hundred seventeen thousand, six hundred eighty".