402609855 has 16 divisors (see below), whose sum is σ = 647553024. Its totient is φ = 213599520.

The previous prime is 402609853. The next prime is 402609887. The reversal of 402609855 is 558906204.

It is not a de Polignac number, because 402609855 - 2¹ = 402609853 is a prime.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402609853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67399 + ... + 73128.

It is an arithmetic number, because the mean of its divisors is an integer number (40472064).

Almost surely, 2^402609855 is an apocalyptic number.

402609855 is a deficient number, since it is larger than the sum of its proper divisors (244943169).

402609855 is a wasteful number, since it uses less digits than its factorization.

402609855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140726.

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 402609855 is about 20065.1402935539. The cubic root of 402609855 is about 738.4052918105.

The spelling of 402609855 in words is "four hundred two million, six hundred nine thousand, eight hundred fifty-five".