84180402 has 24 divisors (see below), whose sum is σ = 187321836. Its totient is φ = 27301536.

The previous prime is 84180401. The next prime is 84180403. The reversal of 84180402 is 20408148.

84180402 is a `hidden beast` number, since 84 + 180 + 402 = 666.

It is an interprime number because it is at equal distance from previous prime (84180401) and next prime (84180403).

It can be written as a sum of positive squares in 2 ways, for example, as 83557881 + 622521 = 9141^2 + 789^2 .

It is not an unprimeable number, because it can be changed into a prime (84180401) 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 11 ways as a sum of consecutive naturals, for example, 62533 + ... + 63864.

Almost surely, 2^84180402 is an apocalyptic number.

84180402 is an abundant number, since it is smaller than the sum of its proper divisors (103141434).

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

84180402 is a wasteful number, since it uses less digits than its factorization.

84180402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126442 (or 126439 counting only the distinct ones).

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

The square root of 84180402 is about 9174.9878474034. The cubic root of 84180402 is about 438.2652112455.

The spelling of 84180402 in words is "eighty-four million, one hundred eighty thousand, four hundred two".