423390605 has 16 divisors (see below), whose sum is σ = 555539904. Its totient is φ = 307207680.

The previous prime is 423390587. The next prime is 423390613. The reversal of 423390605 is 506093324.

It is not a de Polignac number, because 423390605 - 2⁸ = 423390349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15677 + ... + 33053.

It is an arithmetic number, because the mean of its divisors is an integer number (34721244).

Almost surely, 2^423390605 is an apocalyptic number.

It is an amenable number.

423390605 is a deficient number, since it is larger than the sum of its proper divisors (132149299).

423390605 is a wasteful number, since it uses less digits than its factorization.

423390605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17836.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 423390605 is about 20576.4575425412. The cubic root of 423390605 is about 750.8970629060.

The spelling of 423390605 in words is "four hundred twenty-three million, three hundred ninety thousand, six hundred five".