1069021668 has 144 divisors (see below), whose sum is σ = 2974297536. Its totient is φ = 296225280.

The previous prime is 1069021573. The next prime is 1069021687. The reversal of 1069021668 is 8661209601.

It is a super-2 number, since 2×1069021668² = 2285614653307004448, which contains 22 as substring.

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

It is a cake number, because a cake can be divided into 1069021668 parts by 1858 planar cuts.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3859146 + ... + 3859422.

It is an arithmetic number, because the mean of its divisors is an integer number (20654844).

Almost surely, 2^1069021668 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 1069021668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1487148768).

1069021668 is an abundant number, since it is smaller than the sum of its proper divisors (1905275868).

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

1069021668 is a wasteful number, since it uses less digits than its factorization.

1069021668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494 (or 479 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 1069021668 is about 32695.8968067860. The cubic root of 1069021668 is about 1022.4972987098.

The spelling of 1069021668 in words is "one billion, sixty-nine million, twenty-one thousand, six hundred sixty-eight".