164401428 has 12 divisors (see below), whose sum is σ = 383603360. Its totient is φ = 54800472.

The previous prime is 164401403. The next prime is 164401429. The reversal of 164401428 is 824104461.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×164401428³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 164401395 and 164401404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164401429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6850048 + ... + 6850071.

Almost surely, 2^164401428 is an apocalyptic number.

It is an amenable number.

164401428 is an abundant number, since it is smaller than the sum of its proper divisors (219201932).

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

164401428 is a wasteful number, since it uses less digits than its factorization.

164401428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13700126 (or 13700124 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 164401428 is about 12821.9120259032. The cubic root of 164401428 is about 547.8166088526.

Adding to 164401428 its reverse (824104461), we get a palindrome (988505889).

The spelling of 164401428 in words is "one hundred sixty-four million, four hundred one thousand, four hundred twenty-eight".