40166434 has 48 divisors (see below), whose sum is σ = 76684608. Its totient is φ = 15444000.

The previous prime is 40166431. The next prime is 40166449. The reversal of 40166434 is 43466104.

It is a happy number.

It is a super-2 number, since 2×40166434² = 3226684840552712, which contains 22 as substring.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40166431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 221824 + ... + 222004.

It is an arithmetic number, because the mean of its divisors is an integer number (1597596).

Almost surely, 2^40166434 is an apocalyptic number.

40166434 is the 3388-th nonagonal number.

40166434 is a deficient number, since it is larger than the sum of its proper divisors (36518174).

40166434 is a wasteful number, since it uses less digits than its factorization.

40166434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343 (or 332 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 40166434 is about 6337.6994248702. The cubic root of 40166434 is about 342.4688632074.

The spelling of 40166434 in words is "forty million, one hundred sixty-six thousand, four hundred thirty-four".