84004002 has 12 divisors (see below), whose sum is σ = 182008710. Its totient is φ = 28001328.

The previous prime is 84003989. The next prime is 84004003. The reversal of 84004002 is 20040048.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 82791801 + 1212201 = 9099^2 + 1101^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 4666889 = 84004002 / (8 + 4 + 0 + 0 + 4 + 0 + 0 + 2).

It is not an unprimeable number, because it can be changed into a prime (84004003) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2333427 + ... + 2333462.

Almost surely, 2^84004002 is an apocalyptic number.

84004002 is an abundant number, since it is smaller than the sum of its proper divisors (98004708).

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

84004002 is a wasteful number, since it uses less digits than its factorization.

84004002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4666897 (or 4666894 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 84004002 is about 9165.3697143105. The cubic root of 84004002 is about 437.9588689718.

The spelling of 84004002 in words is "eighty-four million, four thousand, two".