400413123 has 24 divisors (see below), whose sum is σ = 631590960. Its totient is φ = 242429760.

The previous prime is 400413073. The next prime is 400413131. The reversal of 400413123 is 321314004.

It is not a de Polignac number, because 400413123 - 2⁸ = 400412867 is a prime.

It is a super-2 number, since 2×400413123² = 320661338141226258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400413096 and 400413105.

It is not an unprimeable number, because it can be changed into a prime (400413173) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 166413 + ... + 168801.

It is an arithmetic number, because the mean of its divisors is an integer number (26316290).

Almost surely, 2^400413123 is an apocalyptic number.

400413123 is a deficient number, since it is larger than the sum of its proper divisors (231177837).

400413123 is a wasteful number, since it uses less digits than its factorization.

400413123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4099 (or 4096 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 400413123 is about 20010.3254096479. The cubic root of 400413123 is about 737.0598721417.

Adding to 400413123 its reverse (321314004), we get a palindrome (721727127).

The spelling of 400413123 in words is "four hundred million, four hundred thirteen thousand, one hundred twenty-three".