402486426 has 24 divisors (see below), whose sum is σ = 872438580. Its totient is φ = 134102976.

The previous prime is 402486379. The next prime is 402486437. The reversal of 402486426 is 624684204.

It is a happy number.

402486426 is a `hidden beast` number, since 4 + 0 + 2 + 4 + 8 + 642 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 364848201 + 37638225 = 19101^2 + 6135^2 .

It is a super-2 number, since 2×402486426² = 323990646228506952, which contains 22 as substring.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 60430 + ... + 66758.

Almost surely, 2^402486426 is an apocalyptic number.

402486426 is an abundant number, since it is smaller than the sum of its proper divisors (469952154).

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

402486426 is a wasteful number, since it uses less digits than its factorization.

402486426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9870 (or 9867 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 36.

The square root of 402486426 is about 20062.0643504102. The cubic root of 402486426 is about 738.3298259131.

The spelling of 402486426 in words is "four hundred two million, four hundred eighty-six thousand, four hundred twenty-six".