402355540 has 12 divisors (see below), whose sum is σ = 844946676. Its totient is φ = 160942208.

The previous prime is 402355529. The next prime is 402355543. The reversal of 402355540 is 45553204.

It can be written as a sum of positive squares in 2 ways, for example, as 307371024 + 94984516 = 17532^2 + 9746^2 .

It is a junction number, because it is equal to n+sod(n) for n = 402355499 and 402355508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402355543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10058869 + ... + 10058908.

It is an arithmetic number, because the mean of its divisors is an integer number (70412223).

Almost surely, 2^402355540 is an apocalyptic number.

It is an amenable number.

402355540 is an abundant number, since it is smaller than the sum of its proper divisors (442591136).

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

402355540 is a wasteful number, since it uses less digits than its factorization.

402355540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20117786 (or 20117784 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 28.

The square root of 402355540 is about 20058.8020579495. The cubic root of 402355540 is about 738.2497838641.

The spelling of 402355540 in words is "four hundred two million, three hundred fifty-five thousand, five hundred forty".