164402890 has 8 divisors (see below), whose sum is σ = 295925220. Its totient is φ = 65761152.

The previous prime is 164402863. The next prime is 164402893. The reversal of 164402890 is 98204461.

164402890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 163865601 + 537289 = 12801^2 + 733^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×164402890³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (164402893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8220135 + ... + 8220154.

Almost surely, 2^164402890 is an apocalyptic number.

164402890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

164402890 is a deficient number, since it is larger than the sum of its proper divisors (131522330).

164402890 is a wasteful number, since it uses less digits than its factorization.

164402890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16440296.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 164402890 is about 12821.9690375543. The cubic root of 164402890 is about 547.8182327345.

The spelling of 164402890 in words is "one hundred sixty-four million, four hundred two thousand, eight hundred ninety".