1069981440 has 288 divisors, whose sum is σ = 3789870336. Its totient is φ = 255098880.

The previous prime is 1069981433. The next prime is 1069981463. The reversal of 1069981440 is 441899601.

It is a super-2 number, since 2×1069981440² = 2289720563888947200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1069981392 and 1069981401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3083347 + ... + 3083693.

It is an arithmetic number, because the mean of its divisors is an integer number (13159272).

Almost surely, 2^1069981440 is an apocalyptic number.

1069981440 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 1069981440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1894935168).

1069981440 is an abundant number, since it is smaller than the sum of its proper divisors (2719888896).

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

1069981440 is a wasteful number, since it uses less digits than its factorization.

1069981440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455 (or 441 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 1069981440 is about 32710.5707684840. The cubic root of 1069981440 is about 1022.8032079232.

The spelling of 1069981440 in words is "one billion, sixty-nine million, nine hundred eighty-one thousand, four hundred forty".