402186040 has 32 divisors (see below), whose sum is σ = 913887360. Its totient is φ = 159280000.

The previous prime is 402186019. The next prime is 402186047. The reversal of 402186040 is 40681204.

It is a super-2 number, since 2×402186040² = 323507221541763200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 402185996 and 402186014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402186047) 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 7 ways as a sum of consecutive naturals, for example, 45736 + ... + 53815.

It is an arithmetic number, because the mean of its divisors is an integer number (28558980).

Almost surely, 2^402186040 is an apocalyptic number.

402186040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402186040 is an abundant number, since it is smaller than the sum of its proper divisors (511701320).

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

402186040 is a wasteful number, since it uses less digits than its factorization.

402186040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99663 (or 99659 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 402186040 is about 20054.5765350456. The cubic root of 402186040 is about 738.1461020026.

The spelling of 402186040 in words is "four hundred two million, one hundred eighty-six thousand, forty".