1069895988 has 108 divisors (see below), whose sum is σ = 3154090212. Its totient is φ = 304899840.

The previous prime is 1069895987. The next prime is 1069896011. The reversal of 1069895988 is 8895989601.

It can be written as a sum of positive squares in 2 ways, for example, as 170615844 + 899280144 = 13062^2 + 29988^2 .

It is a super-2 number, since 2×1069895988² = 2289354850276992288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1069895987) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1342006 + ... + 1342802.

It is an arithmetic number, because the mean of its divisors is an integer number (29204539).

Almost surely, 2^1069895988 is an apocalyptic number.

1069895988 is a gapful number since it is divisible by the number (18) 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 1069895988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1577045106).

1069895988 is an abundant number, since it is smaller than the sum of its proper divisors (2084194224).

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

1069895988 is a wasteful number, since it uses less digits than its factorization.

1069895988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1582 (or 1570 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 63.

The square root of 1069895988 is about 32709.2645591429. The cubic root of 1069895988 is about 1022.7759791311.

The spelling of 1069895988 in words is "one billion, sixty-nine million, eight hundred ninety-five thousand, nine hundred eighty-eight".