400004630405 has 16 divisors (see below), whose sum is σ = 486851947824. Its totient is φ = 315444326400.

The previous prime is 400004630371. The next prime is 400004630413. The reversal of 400004630405 is 504036400004.

It can be written as a sum of positive squares in 8 ways, for example, as 51604845889 + 348399784516 = 227167^2 + 590254^2 .

It is not a de Polignac number, because 400004630405 - 2³⁶ = 331285153669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 353117 + ... + 961613.

It is an arithmetic number, because the mean of its divisors is an integer number (30428246739).

Almost surely, 2^400004630405 is an apocalyptic number.

It is an amenable number.

400004630405 is a deficient number, since it is larger than the sum of its proper divisors (86847317419).

400004630405 is a wasteful number, since it uses less digits than its factorization.

400004630405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610376.

The product of its (nonzero) digits is 5760, while the sum is 26.

The spelling of 400004630405 in words is "four hundred billion, four million, six hundred thirty thousand, four hundred five".