402020055 has 12 divisors (see below), whose sum is σ = 696834840. Its totient is φ = 214410672.

The previous prime is 402020039. The next prime is 402020111. The reversal of 402020055 is 550020204.

It is not a de Polignac number, because 402020055 - 2⁴ = 402020039 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4466845 + ... + 4466934.

It is an arithmetic number, because the mean of its divisors is an integer number (58069570).

Almost surely, 2^402020055 is an apocalyptic number.

402020055 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

402020055 is a deficient number, since it is larger than the sum of its proper divisors (294814785).

402020055 is a wasteful number, since it uses less digits than its factorization.

402020055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8933790 (or 8933787 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 402020055 is about 20050.4377757694. The cubic root of 402020055 is about 738.0445420050.

Adding to 402020055 its reverse (550020204), we get a palindrome (952040259).

The spelling of 402020055 in words is "four hundred two million, twenty thousand, fifty-five".