1069897040 has 80 divisors (see below), whose sum is σ = 2660253840. Its totient is φ = 398745600.

The previous prime is 1069897019. The next prime is 1069897051. The reversal of 1069897040 is 407989601.

It can be written as a sum of positive squares in 8 ways, for example, as 174451264 + 895445776 = 13208^2 + 29924^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1069897040² = 2289359352401523200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1069896982 and 1069897000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133466 + ... + 141254.

It is an arithmetic number, because the mean of its divisors is an integer number (33253173).

Almost surely, 2^1069897040 is an apocalyptic number.

1069897040 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 1069897040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1330126920).

1069897040 is an abundant number, since it is smaller than the sum of its proper divisors (1590356800).

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

1069897040 is a wasteful number, since it uses less digits than its factorization.

1069897040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7920 (or 7914 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 1069897040 is about 32709.2806402097. The cubic root of 1069897040 is about 1022.7763143538.

The spelling of 1069897040 in words is "one billion, sixty-nine million, eight hundred ninety-seven thousand, forty".