1405066688 has 42 divisors (see below), whose sum is σ = 2912385336. Its totient is φ = 671300608.

The previous prime is 1405066603. The next prime is 1405066693. The reversal of 1405066688 is 8866605041.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1437656 + ... + 1438632.

It is an arithmetic number, because the mean of its divisors is an integer number (69342508).

Almost surely, 2^1405066688 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 1405066688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1456192668).

1405066688 is an abundant number, since it is smaller than the sum of its proper divisors (1507318648).

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

1405066688 is an frugal number, since it uses more digits than its factorization.

1405066688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1989 (or 1002 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 44.

The square root of 1405066688 is about 37484.2191862122. The cubic root of 1405066688 is about 1120.0368525289.

The spelling of 1405066688 in words is "one billion, four hundred five million, sixty-six thousand, six hundred eighty-eight".