84553812 has 54 divisors (see below), whose sum is σ = 248633658. Its totient is φ = 24157728.

The previous prime is 84553811. The next prime is 84553817. The reversal of 84553812 is 21835548.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 72692676 + 11861136 = 8526^2 + 3444^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84553811) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 22203 + ... + 25730.

It is an arithmetic number, because the mean of its divisors is an integer number (4604327).

Almost surely, 2^84553812 is an apocalyptic number.

It is an amenable number.

84553812 is an abundant number, since it is smaller than the sum of its proper divisors (164079846).

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

84553812 is a wasteful number, since it uses less digits than its factorization.

84553812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47957 (or 47945 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 84553812 is about 9195.3146765078. The cubic root of 84553812 is about 438.9122788320.

The spelling of 84553812 in words is "eighty-four million, five hundred fifty-three thousand, eight hundred twelve".