84676815 has 24 divisors (see below), whose sum is σ = 148206240. Its totient is φ = 44720064.

The previous prime is 84676799. The next prime is 84676817. The reversal of 84676815 is 51867648.

It is a happy number.

It is not a de Polignac number, because 84676815 - 2⁴ = 84676799 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84676817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4500 + ... + 13769.

It is an arithmetic number, because the mean of its divisors is an integer number (6175260).

Almost surely, 2^84676815 is an apocalyptic number.

84676815 is a deficient number, since it is larger than the sum of its proper divisors (63529425).

84676815 is a wasteful number, since it uses less digits than its factorization.

84676815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18383 (or 18380 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 84676815 is about 9202.0005976961. Note that the first 3 decimals coincide. The cubic root of 84676815 is about 439.1250087208.

It can be divided in two parts, 84676 and 815, that added together give a triangular number (85491 = T₄₁₃).

The spelling of 84676815 in words is "eighty-four million, six hundred seventy-six thousand, eight hundred fifteen".