84065820 has 48 divisors (see below), whose sum is σ = 235858560. Its totient is φ = 22372416.

The previous prime is 84065797. The next prime is 84065837. The reversal of 84065820 is 2856048.

It is a super-3 number, since 3×84065820³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37491 + ... + 39669.

It is an arithmetic number, because the mean of its divisors is an integer number (4913720).

Almost surely, 2^84065820 is an apocalyptic number.

It is an amenable number.

84065820 is an abundant number, since it is smaller than the sum of its proper divisors (151792740).

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

84065820 is a wasteful number, since it uses less digits than its factorization.

84065820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2834 (or 2832 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 84065820 is about 9168.7414621637. The cubic root of 84065820 is about 438.0662729935.

The spelling of 84065820 in words is "eighty-four million, sixty-five thousand, eight hundred twenty".