423402555 has 64 divisors (see below), whose sum is σ = 739952640. Its totient is φ = 206032896.

The previous prime is 423402509. The next prime is 423402559. The reversal of 423402555 is 555204324.

It is not a de Polignac number, because 423402555 - 2⁶ = 423402491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (423402559) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 977619 + ... + 978051.

It is an arithmetic number, because the mean of its divisors is an integer number (11561760).

Almost surely, 2^423402555 is an apocalyptic number.

423402555 is a deficient number, since it is larger than the sum of its proper divisors (316550085).

423402555 is a wasteful number, since it uses less digits than its factorization.

423402555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580.

The product of its (nonzero) digits is 24000, while the sum is 30.

The square root of 423402555 is about 20576.7479208936. The cubic root of 423402555 is about 750.9041274113.

Adding to 423402555 its reverse (555204324), we get a palindrome (978606879).

The spelling of 423402555 in words is "four hundred twenty-three million, four hundred two thousand, five hundred fifty-five".