40143490 has 16 divisors (see below), whose sum is σ = 73443960. Its totient is φ = 15793920.

The previous prime is 40143479. The next prime is 40143491. The reversal of 40143490 is 9434104.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 31505769 + 8637721 = 5613^2 + 2939^2 .

It is a super-2 number, since 2×40143490² = 3222999578760200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40143491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32295 + ... + 33514.

Almost surely, 2^40143490 is an apocalyptic number.

40143490 is a deficient number, since it is larger than the sum of its proper divisors (33300470).

40143490 is a wasteful number, since it uses less digits than its factorization.

40143490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65877.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 40143490 is about 6335.8890457457. The cubic root of 40143490 is about 342.4036420643.

Adding to 40143490 its reverse (9434104), we get a palindrome (49577594).

The spelling of 40143490 in words is "forty million, one hundred forty-three thousand, four hundred ninety".