84620820 has 48 divisors (see below), whose sum is σ = 237480768. Its totient is φ = 22513920.

The previous prime is 84620819. The next prime is 84620839. The reversal of 84620820 is 2802648.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 29907 + ... + 32613.

It is an arithmetic number, because the mean of its divisors is an integer number (4947516).

Almost surely, 2^84620820 is an apocalyptic number.

It is an amenable number.

84620820 is an abundant number, since it is smaller than the sum of its proper divisors (152859948).

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

84620820 is a wasteful number, since it uses less digits than its factorization.

84620820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3240 (or 3238 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 84620820 is about 9198.9575496357. The cubic root of 84620820 is about 439.0281926605.

The spelling of 84620820 in words is "eighty-four million, six hundred twenty thousand, eight hundred twenty".