402105540 has 24 divisors (see below), whose sum is σ = 1125895680. Its totient is φ = 107228128.

The previous prime is 402105523. The next prime is 402105547. The reversal of 402105540 is 45501204.

It is not an unprimeable number, because it can be changed into a prime (402105547) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3350820 + ... + 3350939.

It is an arithmetic number, because the mean of its divisors is an integer number (46912320).

Almost surely, 2^402105540 is an apocalyptic number.

It is an amenable number.

402105540 is an abundant number, since it is smaller than the sum of its proper divisors (723790140).

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

402105540 is a wasteful number, since it uses less digits than its factorization.

402105540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6701771 (or 6701769 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 402105540 is about 20052.5694114246. The cubic root of 402105540 is about 738.0968505615.

Adding to 402105540 its reverse (45501204), we get a palindrome (447606744).

The spelling of 402105540 in words is "four hundred two million, one hundred five thousand, five hundred forty".