84678028 has 24 divisors (see below), whose sum is σ = 153679680. Its totient is φ = 40776960.

The previous prime is 84677959. The next prime is 84678031. The reversal of 84678028 is 82087648.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68173 + ... + 69403.

It is an arithmetic number, because the mean of its divisors is an integer number (6403320).

Almost surely, 2^84678028 is an apocalyptic number.

It is an amenable number.

84678028 is a deficient number, since it is larger than the sum of its proper divisors (69001652).

84678028 is a wasteful number, since it uses less digits than its factorization.

84678028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1857 (or 1855 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 43.

The square root of 84678028 is about 9202.0665070407. The cubic root of 84678028 is about 439.1271055407.

The spelling of 84678028 in words is "eighty-four million, six hundred seventy-eight thousand, twenty-eight".