400320233 has 8 divisors (see below), whose sum is σ = 424365480. Its totient is φ = 376330240.

The previous prime is 400320229. The next prime is 400320259. The reversal of 400320233 is 332023004.

It can be written as a sum of positive squares in 4 ways, for example, as 70425664 + 329894569 = 8392^2 + 18163^2 .

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 400320233 - 2² = 400320229 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400320203) 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, 1613 + ... + 28341.

It is an arithmetic number, because the mean of its divisors is an integer number (53045685).

Almost surely, 2^400320233 is an apocalyptic number.

It is an amenable number.

400320233 is a deficient number, since it is larger than the sum of its proper divisors (24045247).

400320233 is a wasteful number, since it uses less digits than its factorization.

400320233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27627.

The product of its (nonzero) digits is 432, while the sum is 17.

The square root of 400320233 is about 20008.0042233102. The cubic root of 400320233 is about 737.0028720231.

Adding to 400320233 its reverse (332023004), we get a palindrome (732343237).

The spelling of 400320233 in words is "four hundred million, three hundred twenty thousand, two hundred thirty-three".