84689478 has 24 divisors (see below), whose sum is σ = 194288328. Its totient is φ = 26569152.

The previous prime is 84689459. The next prime is 84689509. The reversal of 84689478 is 87498648.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138076 + ... + 138687.

It is an arithmetic number, because the mean of its divisors is an integer number (8095347).

Almost surely, 2^84689478 is an apocalyptic number.

84689478 is an abundant number, since it is smaller than the sum of its proper divisors (109598850).

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

84689478 is a wasteful number, since it uses less digits than its factorization.

84689478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276788 (or 276785 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 54.

The square root of 84689478 is about 9202.6886288736. The cubic root of 84689478 is about 439.1468972894.

The spelling of 84689478 in words is "eighty-four million, six hundred eighty-nine thousand, four hundred seventy-eight".