423400185 has 24 divisors (see below), whose sum is σ = 790348104. Its totient is φ = 208442880.

The previous prime is 423400171. The next prime is 423400217. The reversal of 423400185 is 581004324.

It can be written as a sum of positive squares in 4 ways, for example, as 21678336 + 401721849 = 4656^2 + 20043^2 .

It is not a de Polignac number, because 423400185 - 2⁷ = 423400057 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 361296 + ... + 362465.

It is an arithmetic number, because the mean of its divisors is an integer number (32931171).

Almost surely, 2^423400185 is an apocalyptic number.

423400185 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

423400185 is a deficient number, since it is larger than the sum of its proper divisors (366947919).

423400185 is a wasteful number, since it uses less digits than its factorization.

423400185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723785 (or 723782 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 423400185 is about 20576.6903315378. The cubic root of 423400185 is about 750.9027263443.

The spelling of 423400185 in words is "four hundred twenty-three million, four hundred thousand, one hundred eighty-five".