40143389 has 16 divisors (see below), whose sum is σ = 47355840. Its totient is φ = 33548160.

The previous prime is 40143377. The next prime is 40143391. The reversal of 40143389 is 98334104.

It is a cyclic number.

It is not a de Polignac number, because 40143389 - 2⁴ = 40143373 is a prime.

It is a super-2 number, since 2×40143389² = 3222983360810642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40143289) 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 15 ways as a sum of consecutive naturals, for example, 49217 + ... + 50025.

It is an arithmetic number, because the mean of its divisors is an integer number (2959740).

Almost surely, 2^40143389 is an apocalyptic number.

It is an amenable number.

40143389 is a deficient number, since it is larger than the sum of its proper divisors (7212451).

40143389 is a wasteful number, since it uses less digits than its factorization.

40143389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 40143389 is about 6335.8810752728. The cubic root of 40143389 is about 342.4033549044.

The spelling of 40143389 in words is "forty million, one hundred forty-three thousand, three hundred eighty-nine".