400240263 has 8 divisors (see below), whose sum is σ = 561740800. Its totient is φ = 252783288.

The previous prime is 400240249. The next prime is 400240279. The reversal of 400240263 is 362042004.

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

It is not a de Polignac number, because 400240263 - 2⁶ = 400240199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400240213) 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, 3510823 + ... + 3510936.

It is an arithmetic number, because the mean of its divisors is an integer number (70217600).

Almost surely, 2^400240263 is an apocalyptic number.

400240263 is a deficient number, since it is larger than the sum of its proper divisors (161500537).

400240263 is a wasteful number, since it uses less digits than its factorization.

400240263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7021781.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 400240263 is about 20006.0056732972. The cubic root of 400240263 is about 736.9537929444.

Adding to 400240263 its reverse (362042004), we get a palindrome (762282267).

The spelling of 400240263 in words is "four hundred million, two hundred forty thousand, two hundred sixty-three".