400218023 has 8 divisors (see below), whose sum is σ = 407072400. Its totient is φ = 393419520.

The previous prime is 400218017. The next prime is 400218031. The reversal of 400218023 is 320812004.

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 400218023 - 2¹² = 400213927 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400217986 and 400218004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400218043) 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, 608 + ... + 28298.

It is an arithmetic number, because the mean of its divisors is an integer number (50884050).

Almost surely, 2^400218023 is an apocalyptic number.

400218023 is a deficient number, since it is larger than the sum of its proper divisors (6854377).

400218023 is a wasteful number, since it uses less digits than its factorization.

400218023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27937.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 400218023 is about 20005.4498324831. The cubic root of 400218023 is about 736.9401426802.

The spelling of 400218023 in words is "four hundred million, two hundred eighteen thousand, twenty-three".