40161764 has 12 divisors (see below), whose sum is σ = 70401324. Its totient is φ = 20047104.

The previous prime is 40161739. The next prime is 40161767. The reversal of 40161764 is 46716104.

It can be written as a sum of positive squares in 2 ways, for example, as 19731364 + 20430400 = 4442^2 + 4520^2 .

It is a super-2 number, since 2×40161764² = 3225934575183392, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40161767) 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, 5669 + ... + 10604.

It is an arithmetic number, because the mean of its divisors is an integer number (5866777).

Almost surely, 2^40161764 is an apocalyptic number.

It is an amenable number.

40161764 is a deficient number, since it is larger than the sum of its proper divisors (30239560).

40161764 is a wasteful number, since it uses less digits than its factorization.

40161764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16894 (or 16892 counting only the distinct ones).

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

The square root of 40161764 is about 6337.3309839395. The cubic root of 40161764 is about 342.4555901714.

Adding to 40161764 its reverse (46716104), we get a palindrome (86877868).

The spelling of 40161764 in words is "forty million, one hundred sixty-one thousand, seven hundred sixty-four".