400423130 has 8 divisors (see below), whose sum is σ = 720761652. Its totient is φ = 160169248.

The previous prime is 400423103. The next prime is 400423171. The reversal of 400423130 is 31324004.

It can be written as a sum of positive squares in 2 ways, for example, as 320517409 + 79905721 = 17903^2 + 8939^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 400423099 and 400423108.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20021147 + ... + 20021166.

Almost surely, 2^400423130 is an apocalyptic number.

400423130 is a deficient number, since it is larger than the sum of its proper divisors (320338522).

400423130 is a wasteful number, since it uses less digits than its factorization.

400423130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40042320.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 400423130 is about 20010.5754539943. The cubic root of 400423130 is about 737.0660122141.

Adding to 400423130 its reverse (31324004), we get a palindrome (431747134).

The spelling of 400423130 in words is "four hundred million, four hundred twenty-three thousand, one hundred thirty".