404878623 has 8 divisors (see below), whose sum is σ = 540077568. Its totient is φ = 269799384.

The previous prime is 404878609. The next prime is 404878627. The reversal of 404878623 is 326878404.

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

It is not a de Polignac number, because 404878623 - 2¹² = 404874527 is a prime.

It is a super-2 number, since 2×404878623² = 327853398724752258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404878627) 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, 21711 + ... + 35792.

It is an arithmetic number, because the mean of its divisors is an integer number (67509696).

Almost surely, 2^404878623 is an apocalyptic number.

404878623 is a deficient number, since it is larger than the sum of its proper divisors (135198945).

404878623 is a wasteful number, since it uses less digits than its factorization.

404878623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59853.

The product of its (nonzero) digits is 258048, while the sum is 42.

The square root of 404878623 is about 20121.5959357105. The cubic root of 404878623 is about 739.7897034518.

The spelling of 404878623 in words is "four hundred four million, eight hundred seventy-eight thousand, six hundred twenty-three".