1087788 has 48 divisors (see below), whose sum is σ = 2885120. Its totient is φ = 316224.

The previous prime is 1087787. The next prime is 1087789. The reversal of 1087788 is 8877801.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1087787) and next prime (1087789).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1087781) 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, 2781 + ... + 3147.

2^1087788 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 1087788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1442560).

1087788 is an abundant number, since it is smaller than the sum of its proper divisors (1797332).

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

1087788 is a wasteful number, since it uses less digits than its factorization.

1087788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406 (or 404 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 39.

The square root of 1087788 is about 1042.9707570205. The cubic root of 1087788 is about 102.8445829020.

The spelling of 1087788 in words is "one million, eighty-seven thousand, seven hundred eighty-eight".