84489405 has 128 divisors (see below), whose sum is σ = 192761856. Its totient is φ = 30412800.

The previous prime is 84489347. The next prime is 84489437. The reversal of 84489405 is 50498448.

84489405 = T₃₈₄ + T₃₈₅ + ... + T₈₂₅.

It is not a de Polignac number, because 84489405 - 2⁷ = 84489277 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 255090 + ... + 255420.

It is an arithmetic number, because the mean of its divisors is an integer number (1505952).

Almost surely, 2^84489405 is an apocalyptic number.

84489405 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

84489405 is an abundant number, since it is smaller than the sum of its proper divisors (108272451).

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

84489405 is a wasteful number, since it uses less digits than its factorization.

84489405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387.

The product of its (nonzero) digits is 184320, while the sum is 42.

The square root of 84489405 is about 9191.8118453328. The cubic root of 84489405 is about 438.8008066098.

The spelling of 84489405 in words is "eighty-four million, four hundred eighty-nine thousand, four hundred five".