1405334440 has 16 divisors (see below), whose sum is σ = 3162002580. Its totient is φ = 562133760.

The previous prime is 1405334429. The next prime is 1405334443. The reversal of 1405334440 is 444335041.

It can be written as a sum of positive squares in 2 ways, for example, as 1403701156 + 1633284 = 37466^2 + 1278^2 .

It is a super-2 number, since 2×1405334440² = 3949929776500227200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1405334399 and 1405334408.

It is not an unprimeable number, because it can be changed into a prime (1405334443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17566641 + ... + 17566720.

Almost surely, 2^1405334440 is an apocalyptic number.

1405334440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1405334440 is an abundant number, since it is smaller than the sum of its proper divisors (1756668140).

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

1405334440 is a wasteful number, since it uses less digits than its factorization.

1405334440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35133372 (or 35133368 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 1405334440 is about 37487.7905457230. The cubic root of 1405334440 is about 1120.1079934132.

Adding to 1405334440 its reverse (444335041), we get a palindrome (1849669481).

The spelling of 1405334440 in words is "one billion, four hundred five million, three hundred thirty-four thousand, four hundred forty".