400621126 has 16 divisors (see below), whose sum is σ = 618647904. Its totient is φ = 194431104.

The previous prime is 400621103. The next prime is 400621141. The reversal of 400621126 is 621126004.

It is a junction number, because it is equal to n+sod(n) for n = 400621097 and 400621106.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25791 + ... + 38293.

It is an arithmetic number, because the mean of its divisors is an integer number (38665494).

Almost surely, 2^400621126 is an apocalyptic number.

400621126 is a deficient number, since it is larger than the sum of its proper divisors (218026778).

400621126 is a wasteful number, since it uses less digits than its factorization.

400621126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12975.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 400621126 is about 20015.5221265897. The cubic root of 400621126 is about 737.1874771216.

The spelling of 400621126 in words is "four hundred million, six hundred twenty-one thousand, one hundred twenty-six".