4020240402 has 24 divisors (see below), whose sum is σ = 8945941836. Its totient is φ = 1303861536.

The previous prime is 4020240383. The next prime is 4020240421. The reversal of 4020240402 is 2040420204.

4020240402 is a `hidden beast` number, since 4 + 0 + 20 + 240 + 402 = 666.

It is an interprime number because it is at equal distance from previous prime (4020240383) and next prime (4020240421).

It can be written as a sum of positive squares in 2 ways, for example, as 3491746281 + 528494121 = 59091^2 + 22989^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 3017533 + ... + 3018864.

Almost surely, 2^4020240402 is an apocalyptic number.

4020240402 is an abundant number, since it is smaller than the sum of its proper divisors (4925701434).

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

4020240402 is a wasteful number, since it uses less digits than its factorization.

4020240402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6036442 (or 6036439 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 4020240402 is about 63405.3657193143. The cubic root of 4020240402 is about 1590.0740181515.

Adding to 4020240402 its reverse (2040420204), we get a palindrome (6060660606).

The spelling of 4020240402 in words is "four billion, twenty million, two hundred forty thousand, four hundred two".