4000402040 has 16 divisors (see below), whose sum is σ = 9000904680. Its totient is φ = 1600160800.

The previous prime is 4000402009. The next prime is 4000402057. The reversal of 4000402040 is 402040004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50004986 + ... + 50005065.

Almost surely, 2^4000402040 is an apocalyptic number.

4000402040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4000402040 is an abundant number, since it is smaller than the sum of its proper divisors (5000502640).

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

4000402040 is a wasteful number, since it uses less digits than its factorization.

4000402040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100010062 (or 100010058 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 4000402040 is about 63248.7315287825. The cubic root of 4000402040 is about 1587.4542334131.

Adding to 4000402040 its reverse (402040004), we get a palindrome (4402442044).

The spelling of 4000402040 in words is "four billion, four hundred two thousand, forty".