40173680 has 20 divisors (see below), whose sum is σ = 93403992. Its totient is φ = 16069440.

The previous prime is 40173667. The next prime is 40173689. The reversal of 40173680 is 8637104.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×40173680² = 3227849129484800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (29) 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 (40173689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251006 + ... + 251165.

Almost surely, 2^40173680 is an apocalyptic number.

40173680 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40173680 is an abundant number, since it is smaller than the sum of its proper divisors (53230312).

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

40173680 is a wasteful number, since it uses less digits than its factorization.

40173680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502184 (or 502178 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 40173680 is about 6338.2710576308. The cubic root of 40173680 is about 342.4894556933.

The spelling of 40173680 in words is "forty million, one hundred seventy-three thousand, six hundred eighty".