40161650 has 48 divisors (see below), whose sum is σ = 81296136. Its totient is φ = 14699520.

The previous prime is 40161643. The next prime is 40161677. The reversal of 40161650 is 5616104.

It can be written as a sum of positive squares in 12 ways, for example, as 16900321 + 23261329 = 4111^2 + 4823^2 .

It is a super-2 number, since 2×40161650² = 3225916261445000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30812 + ... + 32088.

Almost surely, 2^40161650 is an apocalyptic number.

40161650 is an abundant number, since it is smaller than the sum of its proper divisors (41134486).

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

40161650 is a wasteful number, since it uses less digits than its factorization.

40161650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343 (or 1338 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 40161650 is about 6337.3219896104. The cubic root of 40161650 is about 342.4552661486.

Adding to 40161650 its reverse (5616104), we get a palindrome (45777754).

The spelling of 40161650 in words is "forty million, one hundred sixty-one thousand, six hundred fifty".