40081164 has 12 divisors (see below), whose sum is σ = 93522744. Its totient is φ = 13360384.

The previous prime is 40081147. The next prime is 40081193. The reversal of 40081164 is 46118004.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1670037 + ... + 1670060.

It is an arithmetic number, because the mean of its divisors is an integer number (7793562).

Almost surely, 2^40081164 is an apocalyptic number.

It is an amenable number.

40081164 is an abundant number, since it is smaller than the sum of its proper divisors (53441580).

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

40081164 is a wasteful number, since it uses less digits than its factorization.

40081164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3340104 (or 3340102 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 40081164 is about 6330.9686462658. The cubic root of 40081164 is about 342.2263472045.

Adding to 40081164 its reverse (46118004), we get a palindrome (86199168).

The spelling of 40081164 in words is "forty million, eighty-one thousand, one hundred sixty-four".