84081402 has 64 divisors (see below), whose sum is σ = 193651200. Its totient is φ = 27363744.

The previous prime is 84081377. The next prime is 84081409. The reversal of 84081402 is 20418048.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (84081409) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 205374 + ... + 205782.

It is an arithmetic number, because the mean of its divisors is an integer number (3025800).

Almost surely, 2^84081402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84081402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96825600).

84081402 is an abundant number, since it is smaller than the sum of its proper divisors (109569798).

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

84081402 is an equidigital number, since it uses as much as digits as its factorization.

84081402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479 (or 461 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 84081402 is about 9169.5911577344. The cubic root of 84081402 is about 438.0933372112.

The spelling of 84081402 in words is "eighty-four million, eighty-one thousand, four hundred two".