405025164 has 24 divisors (see below), whose sum is σ = 1050065520. Its totient is φ = 135008352.

The previous prime is 405025163. The next prime is 405025189. The reversal of 405025164 is 461520504.

405025164 is a `hidden beast` number, since 405 + 0 + 251 + 6 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (405025163) 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, 1875009 + ... + 1875224.

It is an arithmetic number, because the mean of its divisors is an integer number (43752730).

Almost surely, 2^405025164 is an apocalyptic number.

It is an amenable number.

405025164 is an abundant number, since it is smaller than the sum of its proper divisors (645040356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

405025164 is a wasteful number, since it uses less digits than its factorization.

405025164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3750246 (or 3750238 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 405025164 is about 20125.2369923934. The cubic root of 405025164 is about 739.8789453795.

Adding to 405025164 its reverse (461520504), we get a palindrome (866545668).

The spelling of 405025164 in words is "four hundred five million, twenty-five thousand, one hundred sixty-four".