40161612 has 12 divisors (see below), whose sum is σ = 93710456. Its totient is φ = 13387200.

The previous prime is 40161593. The next prime is 40161619. The reversal of 40161612 is 21616104.

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

It is a super-2 number, since 2×40161612² = 3225910156877088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40161619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1673389 + ... + 1673412.

Almost surely, 2^40161612 is an apocalyptic number.

It is an amenable number.

40161612 is an abundant number, since it is smaller than the sum of its proper divisors (53548844).

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

40161612 is a wasteful number, since it uses less digits than its factorization.

40161612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3346808 (or 3346806 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 40161612 is about 6337.3189914979. The cubic root of 40161612 is about 342.4551581409.

Adding to 40161612 its reverse (21616104), we get a palindrome (61777716).

The spelling of 40161612 in words is "forty million, one hundred sixty-one thousand, six hundred twelve".