40171668 has 48 divisors (see below), whose sum is σ = 96780096. Its totient is φ = 12962560.

The previous prime is 40171667. The next prime is 40171669. The reversal of 40171668 is 86617104.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (40171667) and next prime (40171669).

It is a super-2 number, since 2×40171668² = 3227525819804448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40171661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52408 + ... + 53168.

It is an arithmetic number, because the mean of its divisors is an integer number (2016252).

Almost surely, 2^40171668 is an apocalyptic number.

It is an amenable number.

40171668 is an abundant number, since it is smaller than the sum of its proper divisors (56608428).

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

40171668 is a wasteful number, since it uses less digits than its factorization.

40171668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904 (or 902 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 40171668 is about 6338.1123372815. The cubic root of 40171668 is about 342.4837380170.

The spelling of 40171668 in words is "forty million, one hundred seventy-one thousand, six hundred sixty-eight".