1405706404 has 18 divisors (see below), whose sum is σ = 2613205490. Its totient is φ = 661508352.

The previous prime is 1405706399. The next prime is 1405706413. The reversal of 1405706404 is 4046075041.

It can be written as a sum of positive squares in 3 ways, for example, as 235929600 + 1169776804 = 15360^2 + 34202^2 .

It is a super-3 number, since 3×1405706404³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 5 ways as a sum of consecutive naturals, for example, 606849 + ... + 609160.

Almost surely, 2^1405706404 is an apocalyptic number.

It is an amenable number.

1405706404 is a deficient number, since it is larger than the sum of its proper divisors (1207499086).

1405706404 is a wasteful number, since it uses less digits than its factorization.

1405706404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1216047 (or 1216028 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 1405706404 is about 37492.7513527615. The cubic root of 1405706404 is about 1120.2068081115.

The spelling of 1405706404 in words is "one billion, four hundred five million, seven hundred six thousand, four hundred four".