423440557 has 8 divisors (see below), whose sum is σ = 442108800. Its totient is φ = 404793840.

The previous prime is 423440533. The next prime is 423440561. The reversal of 423440557 is 755044324.

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 423440557 - 2⁷ = 423440429 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 (423440527) 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, 44944 + ... + 53542.

It is an arithmetic number, because the mean of its divisors is an integer number (55263600).

Almost surely, 2^423440557 is an apocalyptic number.

It is an amenable number.

423440557 is a deficient number, since it is larger than the sum of its proper divisors (18668243).

423440557 is a wasteful number, since it uses less digits than its factorization.

423440557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10763.

The product of its (nonzero) digits is 67200, while the sum is 34.

The square root of 423440557 is about 20577.6713211189. The cubic root of 423440557 is about 750.9265922458.

The spelling of 423440557 in words is "four hundred twenty-three million, four hundred forty thousand, five hundred fifty-seven".