164021406 has 32 divisors (see below), whose sum is σ = 348945408. Its totient is φ = 51219840.

The previous prime is 164021387. The next prime is 164021411. The reversal of 164021406 is 604120461.

164021406 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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, 19141 + ... + 26351.

It is an arithmetic number, because the mean of its divisors is an integer number (10904544).

Almost surely, 2^164021406 is an apocalyptic number.

164021406 is an abundant number, since it is smaller than the sum of its proper divisors (184924002).

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

164021406 is a wasteful number, since it uses less digits than its factorization.

164021406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7456.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 164021406 is about 12807.0842114823. The cubic root of 164021406 is about 547.3941815049.

Adding to 164021406 its reverse (604120461), we get a palindrome (768141867).

The spelling of 164021406 in words is "one hundred sixty-four million, twenty-one thousand, four hundred six".