402135524 has 24 divisors (see below), whose sum is σ = 806608320. Its totient is φ = 171842976.

The previous prime is 402135523. The next prime is 402135533. The reversal of 402135524 is 425531204.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 402135493 and 402135502.

It is not an unprimeable number, because it can be changed into a prime (402135523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10979 + ... + 30410.

It is an arithmetic number, because the mean of its divisors is an integer number (33608680).

Almost surely, 2^402135524 is an apocalyptic number.

It is an amenable number.

402135524 is an abundant number, since it is smaller than the sum of its proper divisors (404472796).

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

402135524 is a wasteful number, since it uses less digits than its factorization.

402135524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41747 (or 41745 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 402135524 is about 20053.3170323515. The cubic root of 402135524 is about 738.1151961149.

Adding to 402135524 its reverse (425531204), we get a palindrome (827666728).

The spelling of 402135524 in words is "four hundred two million, one hundred thirty-five thousand, five hundred twenty-four".