263401006 has 32 divisors (see below), whose sum is σ = 436855680. Its totient is φ = 118120800.

The previous prime is 263401001. The next prime is 263401027. The reversal of 263401006 is 600104362.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263401001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 830760 + ... + 831076.

It is an arithmetic number, because the mean of its divisors is an integer number (13651740).

Almost surely, 2^263401006 is an apocalyptic number.

263401006 is a deficient number, since it is larger than the sum of its proper divisors (173454674).

263401006 is a wasteful number, since it uses less digits than its factorization.

263401006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 263401006 is about 16229.6335756541. The cubic root of 263401006 is about 641.0213233885.

Adding to 263401006 its reverse (600104362), we get a palindrome (863505368).

The spelling of 263401006 in words is "two hundred sixty-three million, four hundred one thousand, six".