400013023 has 8 divisors (see below), whose sum is σ = 421299200. Its totient is φ = 378750168.

The previous prime is 400012997. The next prime is 400013027. The reversal of 400013023 is 320310004.

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

It is a cyclic number.

It is not a de Polignac number, because 400013023 - 2⁹ = 400012511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400012994 and 400013012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400013027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37840 + ... + 47242.

It is an arithmetic number, because the mean of its divisors is an integer number (52662400).

Almost surely, 2^400013023 is an apocalyptic number.

400013023 is a deficient number, since it is larger than the sum of its proper divisors (21286177).

400013023 is a wasteful number, since it uses less digits than its factorization.

400013023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11661.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 400013023 is about 20000.3255723501. The cubic root of 400013023 is about 736.8142958317.

Adding to 400013023 its reverse (320310004), we get a palindrome (720323027).

The spelling of 400013023 in words is "four hundred million, thirteen thousand, twenty-three".