1405445140 has 48 divisors (see below), whose sum is σ = 3323625984. Its totient is φ = 494582400.

The previous prime is 1405445117. The next prime is 1405445161. The reversal of 1405445140 is 415445041.

It is a junction number, because it is equal to n+sod(n) for n = 1405445099 and 1405445108.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96219 + ... + 109858.

It is an arithmetic number, because the mean of its divisors is an integer number (69242208).

Almost surely, 2^1405445140 is an apocalyptic number.

1405445140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1405445140 is an abundant number, since it is smaller than the sum of its proper divisors (1918180844).

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

1405445140 is a wasteful number, since it uses less digits than its factorization.

1405445140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206128 (or 206126 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 1405445140 is about 37489.2669973687. The cubic root of 1405445140 is about 1120.1374034230.

Subtracting from 1405445140 its reverse (415445041), we obtain a palindrome (990000099).

The spelling of 1405445140 in words is "one billion, four hundred five million, four hundred forty-five thousand, one hundred forty".