40168040 has 32 divisors (see below), whose sum is σ = 98595360. Its totient is φ = 14606400.

The previous prime is 40168039. The next prime is 40168057. The reversal of 40168040 is 4086104.

It is a happy number.

It is a super-2 number, since 2×40168040² = 3226942874883200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40167997 and 40168015.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45206 + ... + 46085.

It is an arithmetic number, because the mean of its divisors is an integer number (3081105).

Almost surely, 2^40168040 is an apocalyptic number.

40168040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40168040 is an abundant number, since it is smaller than the sum of its proper divisors (58427320).

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

40168040 is a wasteful number, since it uses less digits than its factorization.

40168040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91313 (or 91309 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 40168040 is about 6337.8261257311. The cubic root of 40168040 is about 342.4734275298.

The spelling of 40168040 in words is "forty million, one hundred sixty-eight thousand, forty".