84009678 has 16 divisors (see below), whose sum is σ = 176862720. Its totient is φ = 26529336.

The previous prime is 84009677. The next prime is 84009691. The reversal of 84009678 is 87690048.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84009677) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 368350 + ... + 368577.

It is an arithmetic number, because the mean of its divisors is an integer number (11053920).

Almost surely, 2^84009678 is an apocalyptic number.

84009678 is an abundant number, since it is smaller than the sum of its proper divisors (92853042).

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

84009678 is a wasteful number, since it uses less digits than its factorization.

84009678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736951.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 84009678 is about 9165.6793528903. The cubic root of 84009678 is about 437.9687327819.

The spelling of 84009678 in words is "eighty-four million, nine thousand, six hundred seventy-eight".