84390236 has 24 divisors (see below), whose sum is σ = 170002560. Its totient is φ = 35905392.

The previous prime is 84390233. The next prime is 84390281. The reversal of 84390236 is 63209348.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 84390196 and 84390205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84390233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6950 + ... + 14733.

It is an arithmetic number, because the mean of its divisors is an integer number (7083440).

Almost surely, 2^84390236 is an apocalyptic number.

It is an amenable number.

84390236 is an abundant number, since it is smaller than the sum of its proper divisors (85612324).

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

84390236 is a wasteful number, since it uses less digits than its factorization.

84390236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21833 (or 21831 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 84390236 is about 9186.4158407945. The cubic root of 84390236 is about 438.6290593411.

The spelling of 84390236 in words is "eighty-four million, three hundred ninety thousand, two hundred thirty-six".