400423070 has 8 divisors (see below), whose sum is σ = 720761544. Its totient is φ = 160169224.

The previous prime is 400423069. The next prime is 400423087. The reversal of 400423070 is 70324004.

It is a happy number.

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

It is a Curzon number.

It is a congruent number.

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, 20021144 + ... + 20021163.

It is an arithmetic number, because the mean of its divisors is an integer number (90095193).

Almost surely, 2^400423070 is an apocalyptic number.

400423070 is a deficient number, since it is larger than the sum of its proper divisors (320338474).

400423070 is a wasteful number, since it uses less digits than its factorization.

400423070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40042314.

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 400423070 is about 20010.5739547870. The cubic root of 400423070 is about 737.0659753998.

Adding to 400423070 its reverse (70324004), we get a palindrome (470747074).

The spelling of 400423070 in words is "four hundred million, four hundred twenty-three thousand, seventy".