84381810 has 32 divisors (see below), whose sum is σ = 205543872. Its totient is φ = 22165440.

The previous prime is 84381797. The next prime is 84381811. The reversal of 84381810 is 1818348.

It is a happy number.

It is a super-2 number, since 2×84381810² = 14240579717752200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (84381811) 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 15 ways as a sum of consecutive naturals, for example, 18981 + ... + 23000.

It is an arithmetic number, because the mean of its divisors is an integer number (6423246).

Almost surely, 2^84381810 is an apocalyptic number.

84381810 is an abundant number, since it is smaller than the sum of its proper divisors (121162062).

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

84381810 is a wasteful number, since it uses less digits than its factorization.

84381810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42058.

The product of its (nonzero) digits is 6144, while the sum is 33.

The square root of 84381810 is about 9185.9572174053. The cubic root of 84381810 is about 438.6144604505.

The spelling of 84381810 in words is "eighty-four million, three hundred eighty-one thousand, eight hundred ten".